modoc plateau geology

The federally-listed Lost River sucker (Deltistes luxatus), and shortnose sucker (Chasmistes brevirostris), bull trout, and salmon stocks drive many of the conservation activities in the ecoregion. Includes Shumuray Ranch Basalt and Antelope Flat Basalt of Kittleman and others (1965), Grassy Mountain Basalt of Corcoran and others (1962), Drinkwater Basalt of Bowen and others (1963), basalt formerly assigned to Danforth Formation by Piper and others (1939) (see Walker, 1979), Hayes Butte Basalt of Hampton (1964), Pliocene and upper Miocene basalt flows capping and interstratified with the Madras (or Deschutes) Formation, and basalt flows interstratified in the Dalles Formation of Newcomb (1966; 1969). In places includes flows of platy olivine andesite or basaltic andesite. However, each of the proposed uses would not expose people or new structures to potential substantial adverse effects, including the risk of loss, injury, or death. The Modoc Plateau is a large volcanic tableland in the northeast corner of the state. Identify Priority Places: A Practitioner's Guide, Cumberlands and Southern Ridge and Valley, Willamette Valley-Puget Trough-Georgia Basin. Up to 10,000 feet of sandstone and red shale deposited during the Eocene, after which sea levels dropped in the Oligocene preserved the sand, gravel and silt of the Sespe Formation. About 85 percent of mercury produced in the US throughout its history was mined in the Coast Ranges, with about $200 million worth extracted between 1850 and 1980. US 97: Weed-Oregon 294. Whitebark pine (Pinus albicaulis), lodgepole pine, and western larch (Larix occidentalis) are common components of many of these forests. During the Nevadan orogeny in the Jurassic, extensive folding and faulting altered the rocks and huge granite batholiths erupted. Hill*s work, however, is of little value in understanding the areal . These sulfide minerals derive from the Copley Greenstone and or sea floor vents when the region was far offshore and formed as hot water "invaded" the Balaklala rhyolite. On this Wikipedia the language links are at the top of the page across from the article title. Yields and specific capacities of -wells in the unconfined water body within volcanic rocks and lake deposits range widely . The Upper Klamath Basin and the Modoc Plateau are large land forms that characterize the southern portion of the ecoregion. Therefore, a less-than-significant impact is expected. Shrub-steppe vegetation composed of big sagebrush (Artemesia tridentata) or antelope bitterbrush (Purshia tridentata) and native bunchgrasses occurs along the foothills and higher south-facing slopes. Rockhounding. The color geologic road maps, based on the 2010 Geologic Map of California, are detailed and easy to read. Read more Print length 384 pages The Whipp-Cupvar Complex, 0 to 2 percent slope soils occupy the central, northern portion of the southern half of the site. The Santa Monica Mountains and the Channel Islands are different than the mountains to the north because they have granitic and metamorphic basement rocks more like the Sierra Nevada. The Peninsular Ranges were never glaciated during the Pleistocene. Non-seismic hazards addressed in the document include volcanoes, erosion, and expansive soils. They are shallow, moderately well drained soils with slow permeability and have a high shrink-swell potential (see TableVI-1). The region surrounding the Modoc Plateau, encompassing parts of northeastern California, southern Oregon, and northwestern Nevada, lies at an intersection between two tectonic provinces; the Basin and Range province and the Cascade volcanic arc. These soils are relatively deep (40 to 60 inches), well drained gravelly loams with moderately slow permeability. Unconsolidated to semiconsolidated lacustrine clay, silt, sand, and gravel; in places includes mudflow and fluvial deposits and discontinuous layers of peat. Fast flowing rivers meant that the region has accumulated very little alluvium, except for a rare 400 foot thick deposit in Scott Valley, southwest of Yreka, California. Nearly 1,000,000 acres (400,000ha) of the Modoc National Forest are on the plateau between the Medicine Lake Highlands in the west and the Warner Mountains in the east. They are derived from lake sediments and alluvium, which formed from extrusive igneous rocks. 0 Reviews. Modoc National Forest 800 West 12th Street Alturas, CA 96101 (530) 233-5811 Warner Mountain Ranger District PO Box 220 Cedarville, CA 96104 (530) 279-6116 Camping Warren Peak and Patterson Lake The nearest campground is available at Pepperdine Camp, near the trailhead. Its main production ran from 1892 to the 1940s, supplying lubricating oil for other refineries. Age, mostly Oligocene; may include some rocks of early Miocene age. Policy SG-d - Shasta County shall develop and maintain standards for erosion and sediment control plans for development. Ash-flow tuff, lava flows, pumice-lapilli tuff, coarse pumicite, flow breccia, and domal complexes of rhyolitic, rhyodacitic, and dacitic composition; in places includes peralkaline rhyolite and some andesite and andesite breccia. Unit is present in all counties. Surface fault rupture is not necessarily restricted to the area within an Alquist-Priolo Zone. [12] During the Pleistocene, the mountains had a large number of glaciers and cirques and glacially-carved U-shaped valleys are remaining features from that time period. Dugan and Graven soils are comprised of soils formed on mounds and stream terraces from alluvium of extrusive igneous rocks. With much of the bays only 30 feet deep, human activity has accelerated erosion and filling due to historical hydraulic mining and farming. The volcano is constructed mainly ofmaficlavas, although drillhole data indicate that a larger volume ofrhyoliteis present than is indicated by surface mapping. [17]. [13]. Each of the proposed transfer properties are located within a seismically active region and could experience significant groundshaking and/or earthquake induced landslides resulting from displacement along one of the following Holocene Faults including the, McArthur, Mayfield, Pittville, Hat Creek, and Rocky Ledge faults. Even moderate shaking . They have a low shrink-swell potential, low to moderate water erosion hazard, and a low wind erosion hazard in bare areas (see TableVI-1). Volcanic eruptions in the Miocene between 9.5 and 3.5 million years ago filled old eroded canyons in parts of the Sierras with lava flows. "Occasioned lakes, marshes, and sluggishly flowing streams meander across the plateau. This region of the mountains was likely underthrusted by the adjoining plates, producing multiple schists around 380 to 400 million years ago in the Ordovician. The western gray squirrel is at-risk within the ecoregion in Washington as it is restricted to two isolated populations, but populations in Oregon and California are more robust. Requires ability to work and study under rigorous conditions. Geologic Guide to the Modoc Plateau and the Warner Mountains: Annual Field Trip Guidebook of the Geological Society of . [9]. The Modoc Plateau is part of the larger Columbia Plateau which extends into eastern Oregon and Washington, southern Idaho, northern Nevada and western Wyoming. In 1873, 53 Modoc men held off 650 US troops, killing 70 of them in heavy weather in the lava plateau to the south of Tule Lake. The soils have a Capability Class rating of IV and are not considered Prime Farmland. This area lies along the northwestern-most flank of the Sierra Nevada Geomorphic Province. These soils formed in basins from fine-textured alluvium from extrusive and basic igneous rock. Gold has been recovered along the eastern margin of the Great Valley, where it was derived from the Sierra Nevada. Statutes such as Section 404 of the Clean Water Act and other federal and state regulations require an erosion and sedimentation control plan prior to major construction. High Cascades and the Modoc Plateau Road Guides 294. Selected large landslides, such as Blackhawk slide on north side of San Gabriel Mountains; early to late Quaternary. This act requires the State Geologist to delineate various seismic hazard zones and requires cities, counties, and other local permitting agencies to regulate certain development projects within these zones. These basins steadily filled with sediment, with one famous example preserved as the Great Valley beds in the Coast Ranges. Finally, the Modoc Plateau, a volcanic table ranging from 4,000 to 6,000 feet (1,200 to 1,800 m) in elevation, separates the Medicine Lake Highlands in the west from the Warner Mountains in the east, covering roughly 1,000,000 acres (400,000 ha) of the forest. Course Description: Application of the principles of geology to interpret rock sequences and evaluate the potential for volcanic activity in the Cascades Range and Modoc Plateau region of Northern California. The plateau supports large herds of Mule Deer (Odocoileus hemionus), Rocky Mountain Elk (Cervus canadensis), and Pronghorn (Antilocapra americana). The three interconnected Suisun, San Pablo and San Francisco bays occupy a structural depression dating to the Pliocene which flooded several times due to Pleistocene glaciations. According to available geologic maps from the California Division of Mines and Geology (CDMG), the Modoc Plateau is underlain by Tertiary sediments and recent volcanic rocks that have been block-faulted into north trending ranges, which have resulted in large open valleys. The Klamath Mountains have several areas of preserved oceanic crust. As indicated in the Project Description, no substantial construction or physical modifications to structures located at the McArthur-Burney Falls Memorial State Park, Bowman Ditch, and Ahjumawi property are proposed in connection with the transfer of ownership. The southern portion of the McArthur Swamp property is comprised of numerous soil mapping units, which include the Cupvar, Whipp, Pittville, Dugan, and Graven soil series. In the northern end of the county are notable Goose Lake, Tule Lake, and the three lakes of Surprise Valley. Much more recent Pliocene terrestrial sedimentary rocks are also common in the northern Peninsular Ranges like the San Timoteo Canyon and Mount Eden conglomerate, sandstone and siltstone which are up to 7000 feet thick. Broad valleys occupy the lowlands between the mountain ridges. Occasional lakes, marshes, and sluggishly owing streams meander across the plateau. Much of the remainder of the East Cascades to the north in Oregon is drained by the Deschutes River system, which includes a series of large lakes and reservoirs near its headwaters. Modoc Plateau, and West Cascades Ecoregional Assessments. The Western Jurassic Plate stretches for 220 miles on the western edge of the mountains. Fisher, once common in this ecoregion, now occurs only in the extreme southwestern portion of the East Cascades. These rocks were likely moved to their current location by the two major faults. Cascades & Modoc Plateau Geology - YouTube Skip navigation Sign in 0:00 / 45:45 Cascades & Modoc Plateau Geology Kiersti Ford 541 subscribers Subscribe 6 Dislike Share 195 views Oct 7, 2021. Better run fast! Water erosion hazard for bare soil is low to moderate, while the wind erosion hazard is low (refer to TableVI-1). in Geology from Syracuse University with a focus on. In fact, the East Cascades support an unusually high aquatic biodiversity among ecoregions in the U.S., including a large number of endemic freshwater snails and fish. From the oldest to the youngest, Georgia's provinces are the Piedmont, Blue Ridge, Valley and Ridge, Appalachian Plateau, and the Coastal Plain. The rugged terrain of the Modoc Plateau played an important role in the Modoc War. Major Pierson Reading found gold in 1848 in the Trinity River near Douglas City. Adherence to appropriate engineering, design, and construction practices, such as dust control, seasonal considerations, and rapid revegetation, would minimize impacts involving these improvements at the McArthur Swamp property, resulting in a less than significant impact. The San Andreas Fault became perhaps most active after the Miocene, potentially resulting in up to 350 miles of offset in some locations.[2][3]. Fissure eruptions. Oil is also abundant in the San Joaquin Valley, but almost non-existent in the Sacramento Valley. The geomorphology of the Sierra Nevada is comparatively recent, dating to as recently as the Quaternary. The New Almaden mine opened in 1824, ultimately extending 2,450 feet below ground. The thick Galice formation slate and metamorphosed greywacke overlie the Josephine ophiolite and likely deposited in a deep ocean environment offshore of the island arc. The West Shasta district has a long history of copper and zinc production out of chalcopyrite and sphalerite. The ecoregion includes a large pumice zone in central Oregon, dominated by lodgepole pine (Pinus contorta), one of the very few places where the species is the climax tree (not replaced by other conifers if fire is suppressed). The Josephine ophiolite forms the basement of the western Klamath Mountains, with extensive peridotite from the boundary between the oceanic crust and the mantle, as well as chromite and nickel deposits. As indicated by PG&E in their PEA, wetland construction work will be completed under a USACOE Nationwide No. Consequently, these soils will continue to remain submerged on an annual basis. Furthermore, each of the properties would be subject to regional volcanic events originating from the previously discussed volcanoes. Columbia River / Modoc Plateau basalt. In all, 20 oil fields are located in the Santa Barbara Channel, with one of the largestthe Dos Cuadras fieldfound in 1968, although a major spill on January 18, 1969, hampered interest in the field. They are small in area and are thought to represent a higher-grade metamorphic environment than the slate belt, and may have formed through subduction, when one plate slid beneath another. The monument, established in 1925, includes the sites of many important battles of the Modoc Indian War of 1872-73. [1] It has cinder cones, juniper flats, pine forests, and seasonal lakes. These areas contain a series of broad, relatively flat mid-elevation valleys that once supported a vast expanse of lakes and marshes that drained into the Klamath River. Throughout the Jurassic the Nevadan Orogeny accelerated with large-scale granitic intrusions and erosion into deep marine basins. The transfer property within the State Park is located on two constituent soil types. The Pastolla Muck, drained, 0 to 2 percent slopes and Pastolla muck, 0 to 1 percent slopes occupy a large portion of the area of the northern quadrants along the Tule River. The tribes manage tribally-owned lands on reservations and are also involved in monitoring and research activities on ceded lands. In the 19th century, a railroad pier was built out into the canyon to avoid waves closer in to shore when loading and unloading ships. Roadside Geology of Northern and Central California, "Second Edition", 2016, Alt/Hyndman Roadside Geology of Oregon, "Second Edition", 2016, Marli B. Miller They have a Capability Class rating of II and are classified as Prime Farmland when properly drained and irrigated (NRCS, 2000). You'll get a detailed solution from a subject matter expert that helps you learn core concepts. What is this giant ro. [1], During the Cenozoic, the volcanic and deep water sedimentary Franciscan rocks were accreted to the edge of California and vast areas of marine sedimentary rocks deposited in the Central Valley and what would become the Transverse and Coast Ranges. Very hot and fluid, but low in volatile content. In addition, the Bowman Ditch and surrounding area are located within an area that could be affected by regional volcanic events originating within the Mt. Per square mile of drainage, the Eel River has the highest suspended sediment load of any river in the US, exceeding the Colorado River and Mississippi River. The Modoc Plateau is located in the northeastern corner of the state, framed by and including the Warner Mountains and Surprise Valley along the Nevada border to the east and west to the edge of the southern Cascades Range. Additionally, when polygons have been edited and changed to alluvium, Qal was used as the general value; hence it now is present in all counties. 896, p. 1018-1019). Starting on p. 15, this book is divided into seven chapters dealing with the gold-bearing provinces: 1) Sierra Nevada, 2) Klamath Mountains, 3) Basin Ranges, 4) Mojave Desert,S) Transverse and Peninsular Ranges, 6) Modoc Plateau . The soil lacks a substantial proportion of clay and therefore, has a low shrink-swell potential (refer to TableVI-1). Before the end of the Oligocene, sea levels rose again leaving behind the Vaqueros Formation and then the Miocene deep water silt and clay of the Rincon Formation. This property could potentially be subjected to ground motion from displacement along any of these local and regional faults. The eastern portion of the property is underlain by Plio-Pleistocene olivine basalt flows such as those exposed by the falls on Burney Creek (CDMG, 1994). Geologists have subdivided the four terranes in the mountain range, referring to them as "plates.". Major uplift was going on in Pleistocene, with some marine terraces raised 1000 feet. Locally includes soils containing abundant organic material, and thin peat beds. ;] Alluvium, lake, playa, and terrace deposits; unconsolidated and semi-consolidated. Eruptions relatively quiet, but spectacular. The proposed project involves no earthwork at the Burney Falls, Bowman Ditch, and Ahjumawi Properties. An exception is the broad Teays Valley which was created by a large, preglacial river. Dominant land uses are forestry, livestock grazing, recreation and conservation. The strata form characteristic flat-topped hills, and consist of a succession of light-colored clays and white or yellowish-white sandstones. Most of these wetlands have been drained and converted to agriculture. Shelf and slope deposits would ultimately become Great Valley rocks, while the trench deposits became the Franciscan subduction complex. Wetlands in the ecoregion are home to many birds including bald eagles, geese, ducks, herons, cranes, rails, and various songbirds. Kokanee (Oncorhynchus nerka) can be found in lakes in the northern and central portions of this ecoregion in Washington. An abundance of species are supported by high elevation meadows, parklands and forests: low-elevation dry forests, oak woodlands, cliffs and talus slopes, riparian corridors, and a variety of aquatic habitats. Links to Completed Ecoregional Assessments. Most intrusive igneous rocks are tonalite, granodiorite, quartz diorite or gabbro. This project could not have been undertaken without the financial support of The Nature Conservancy's Oregon, Washington and California offices, and the Washington Department of Fish and Wildlife (WDFW). Activities planned for the McArthur Swamp after the ownership transfer would not differ substantially from historic activities undertaken in the area since site reclamation earlier in the century. The river drains a 612-square mile area, but due to the porous volcanic nature of the region, most of the stream flow originates from springs within the valley. The Seismic Hazards Mapping Act was developed to protect the public from the effects of strong groundshaking, liquefaction, landslides, or other ground failure, and from other hazards caused by earthquakes. MODOC PLATEAU The Modoc Plateau is a volcanic table land (elevation 4,000- 6,000 feet above sea level) consisting of a thick accumulation of lava ows and tu beds along with many small volcanic cones. The Modoc Plateau lies in the northeast corner of California as well as parts of Oregon and Nevada. The plateau is capped with scattered small, young cinder cones and basalt flows. GitHub export from English Wikipedia. The Marble Mountain Cambrian quartzite lies unconformably atop Proterozoic granites. [10], At the edge of the Los Angeles coastal plain and just west of the San Joaquin Hills, Newport Bay is a major hub of boating. The Modoc National Forest has four obsidian mines in the Warner Mountains near Davis Creek, Calif. on the east side of the forest where it is legal to collect obsidian with a free permit available from the Forest Supervisor's office in Alturas. [16]. Major geologic changes began in the Cenozoic with continued continental shelf deposition of shale, sandstone and clay as well as near-shore tropical coal deposits. These soils have a Capability Class rating of III to IV and are considered Prime Farmland when irrigated (NRCS, 2000). Lava Beds National Monument contains the best examples of these, although numerous locations boast similar features, such as the Ahjumawi Lava Springs. The area extends north to the Oregon border and south to include the Skedaddle Mountains and the Honey Lake Basin. It is the only state with all three types of plate boundaries, an extraordinary history of earthquakes and volcanoes, and it has many rocks and minerals found nowhere else. Copyright 2023 NatureServe. Free shipping for many products! The small Conejo field to the east of Camarillo was geologically unusual in that the reservoir rock is fractured volcanic rock from the Miocene. This added metavolcanic and metasedimentary rocks to the slowly building Sierras. [11]. However, the Greenhorn Fault system is more active to the south, extending to the Tehachapi Mountains and causing more plateau-like landforms. The Golden State includes both the highest and lowest point in the continental US and practically every conceivable geological feature known. They have a Capability Class rating of IV and are considered Prime Farmland if drained and irrigated (NRCS, 2000). Areas along the northeastern shores of Big Lake are mapped as Recent Modoc basalt flows (CDMG, 1968). In places contains mollusks or vertebrate fossils indicating Pleistocene age; mostly deposits of late Pleistocene age, but locally includes some deposits of early Holocene age. California was the first place in the US to develop offshore oil drilling in the Summerland field, first found in 1896. Many of the ash--flow tuffs exhibit flow features and only obscure vitro-clastic textures. We'll be adding other personal features soon. Basalt is aphyric to moderately porphyritic with phenocrysts of plagioclase and olivine and exhibits both subophitic and diktytaxitic textures. In places includes interlayers of silicic volcaniclastic rocks and tuffaceous sedimentary rocks. These soils have a Capability Class rating of III to IV, due to erosion hazards and are not considered to be Prime Farmland (NRCS, 2000). Sur Series schist, quartzite, marble, gneiss and granulite in the Salinian block likely deposited in a marine shelf late in the Paleozoic. The oldest rocks in California date back 1.8 billion years to the Proterozoic and are found in the San Gabriel Mountains, San Bernardino Mountains, and Mojave Desert. [18]. LavaBeds National Monument encompasses about 188 km2(73 mi2) on the northern flank of Medicine Lake volcano and displays mostlybasalticand someandesiticlavas. Most precipitation accumulates from November through April. Depth to oil is very shallow in the Santa Barbara Channel fields, at only 300 feet below the sea floor. The movement of the San Andreas Fault and Garlock Fault helped to induce arid conditions during the Cenozoic. The bulk of the plateau is composed of ancient lava flows and volcanic tuff dating back between 10 and 2 million years ago during the Tertiary period. In Rome Basin, includes discontinuous layers of poorly consolidated conglomerate characterized by well-rounded, commonly polished pebbles of chert and pebbles and cobbles of quartzite. Henhill Silt Loams are classified as neutral to slightly alkaline and have moderate shrink-swell potential. A thick sequence of mostly terrestrial sedimentary rocks including the Rosario, Ladd, Trabuco and Williams formations is exposed on the western slope of the Santa Ana Mountains and Santa Ana Canyon, stretching southward to Camp Pendleton, San Onofre, and smaller exposures in Encinitas, Leucadia, Point Loma and La Jolla. Policy SG-f - Shasta County shall pursue preparation of development standards based on topography and soil erosion potential in revising its land capability standards pursuant to Policy CO-h. Policy SG-g - Shasta County should comply with the requirements of the Seismic Hazards Mapping Act, when the Seismic Hazards Maps for the County are completed and made available by the State Geologist. flow of the Modoc Plateau exposed in a road cut about 4 miles northeast of Alturas on Highway 395. The California Geological Survey's interactive geological map allows users to identify the different rock types and fault lines throughout California. Twenty-five thousand feet of Jurassic marine sediments in the Sacramento Valley do not necessarily correspond exactly to the height of the mountains, but fist-sized cobbles in conglomerates from the Cretaceous suggest steep conditions and potentially higher altitudes than today. The Mojave Desert extends into areas of Basin and Range terrain and includes some of the oldest rocks exposed at the surface in California. Ships from Sacramento, CA. Quaternary pyroclastic and volcanic mudflow deposits. The Kern River and San Joaquin River both run in valleys "refilled" with lava. The purpose of the Alquist-Priolo Act is to regulate development on or near active fault traces to reduce the hazard of fault rupture and to prohibit the location of most structures for human occupancy across these traces. True. Reference: Chorlton, L.B. The Clear Lake National Wildlife Refuge and Long Bell State Game Refuge are located on the plateau as well. California Geological Survey External Resources This product is available, please note the publication series and number, and then contact: California Geological Survey Publications 801 K Street MS 14-34 Sacramento, CA 95814-3532 Phone: (916) 327-1850 Fax: (916) 327-1853 Email: cgspubs@conservation.ca.gov There are no septic tanks or wastewater disposal systems proposed as part of this project, therefore this item is not applicable. A lock () or https:// means youve safely connected to the .gov website. These disturbances could cause increased dust generation, siltation caused by placement of large aggregate on the waterside of levees, local soil compaction caused by equipment loads, and exposure of mineral soil surfaces to erosion. Some rocks in the Western Jurassic Plate seem to have been subducted, reaching blueschist grade metamorphism in the sequence of metamorphic facies in the South Fork Mountain schist. The plateau is cut by many north-south faults. Mineral materials found on the forest include obsidian and obsidian needles, petrified wood and assorted gemstones. Rhyolitic to dacitic varicolored bedded tuff, lapilli tuff, and fine- to medium-grained tuffaceous sedimentary rocks with interstratified welded and nonwelded ash-flow tuff and interbedded basalt and andesite flows. Contribute to chinapedia/wikipedia.en development by creating an account on GitHub. The highest point on the rim of Medicine Lake volcano'scalderais 2,412 m (7,913 ft). . Also includes minor rhyolite and dacite flows and domes. Compared with the Sierra Nevada, rocks from this time period tend be more calcic than silicic. Many of these schists, like the Condrey Mountain schist are more resistant to erosion than other rocks close by. Geological Survey of Canada, Open File 5529. Geologists have interpreted the bay as the drowned channel of the Santa Ana River. The exception to this is where the natural drainage regime is altered, as is the case for areas immediately adjacent to the channeled ditch. During the Jurassic high sea levels retreated, switching to the deposition of the terrestrial Aztec sandstone. Tertiary intrusive rocks; mostly shallow (hypabyssal) plugs and dikes. Franciscan rocks have a complex geological structure. The vast tableland between the Cascades and the Warners is referred to as the Modoc Plateau. Older alluvium, lake, playa, and terrace deposits. They are very deep, poorly drained soils with slow permeability and a high shrink-swell potential (see TableVI-1). This mapping unit is typically found at the base of toe slopes where alluvium from basalt has been deposited. Funding was provided to WDFW through a state wildlife grant from the United These soils also occupy smaller areas along Fall River in the southern half of the property. The Modoc exploited collapse pits and lava tunnels, turning to Tule Lake for food (subsequent drainage has reduced the lake shoreline). Additionally, the Burney Falls area could be affected by regional volcanic events originating within the Mt.

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