modoc plateau geology

Eruptions relatively quiet, but spectacular. Golden eagles (Aquila chrysaetos) inhabit a small portion of their historical ranges and are limited in distribution while the peregrine falcon (Falco peregrinus) is making a comeback. 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. They have a Capability Class rating of IV and are considered Prime Farmland if drained and irrigated (NRCS, 2000). On this Wikipedia the language links are at the top of the page across from the article title. Forest stand patterns on the landscape often reflect this complex fire history. Several Quaternary and Holocene faults are located within a 60-mile radius of the site. These soils are also basin soils and formed from alluvium derived from extrusive igneous rock. The mountains are drained by the Russian, Eel, Mad and Klamath rivers which tend to follow faults and folds. In the northeastern corner of California, lies a massive volcanic plain known as the Modoc Plateau. Chromite weathers out of peridotite in the Josephine ophiolite in Del Norte County and some beach placers close to Crescent City have up to seven percent chromite. 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). The Shasta County General Plan contains a Public Safety Element as required by Section 65302(g) of the California Government Code, which requires that General Plans include an element containing identification and appraisal of seismic and geologic hazards. Their distribution and numbers are significantly reduced, particularly due to dams that restrict their passage through much of the ecoregion. Geological Gems of State Parks Roadside Geology of Northern and Central California|Paperback California has some of the most distinctive and unique geology in the United States. 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 McArthur Swamp and the Glenburn Dredge Site are located within the same regional geographical area and geomorphic province as the McArthur-Burney Falls Memorial Park. Geology of Petroglyph Point, Lava Beds, California - YouTube As indicated by PG&E in their PEA, wetland construction work will be completed under a USACOE Nationwide No. During the Jurassic, many sediments shed into the region from the rising proto-Sierra Nevada. These rocks date to the Cretaceous, with a lower sequence of conglomerate overlain by sandstone and shale, with huge ammonite fossils. The bay system was the second place in the US to be mapped in 1826 by Edward Belcher and Alex Collie, a surveyor and surgeon respectively on the British vessel HMS Blossom. Play-fairway analysis for geothermal resources and - ScienceDirect These soils developed in basins from stratified alluvium of ash and lacustrine deposits. It is a succession of valleys, that in the past were inland lakes, and which follow one another through the county from north to south. A thrust fault, known as the Trinity or Bully Choop thrust, separates the Eastern Klamath Plate from the Central Metamorphic Plate. Project work may include post fire recovery efforts. Since the active McArthur fault traverses the site, any displacement along this segment of the fault could result in potential fault rupture at the surface. Consequently, these soils will continue to remain submerged on an annual basis. These two locations are located approximately 30 miles east of the Park and less than a mile south of the Bowman Ditch and Ahjumawi Property. The plateau is thought to have been formed approximately 25 million years ago. Gassaway soils occur approximately 30percent of the complex and have formed from eolian deposits in pockets of the broken Lava Flow lands. Five Holocene Faults including the McArthur, Mayfield, Pittville, Hat Creek, and Rocky Ledge faults are all located within 20 miles of the property. The proposed project involves no earthwork at the Burney Falls, Bowman Ditch, and Ahjumawi Properties. Fisher, once common in this ecoregion, now occurs only in the extreme southwestern portion of the East Cascades. The McArthur fault is mapped as trending in a northwesterly direction about three miles northeast of the site between Big Lake and Horr Pond (CDMG, 1994). Wetlands in the ecoregion are home to many birds including bald eagles, geese, ducks, herons, cranes, rails, and various songbirds. Sandstone, shale, and conglomerate; in part Miocene and Eocene. With the close-proximity of numerous faults, these sites within the Park could potentially be subjected to ground motion from displacement along any of these local and regional faults. As a registered user, you can customize maps, save them, and share them with your friends. Map unit used in all counties for recent lake beds, playas, and flood plains. 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. Modoc Plateau Flood Basalt Layers Earthcache (GC1X4B5) was created by PathfinderMark on 8/11/2009. 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. Geologic units in Modoc county, California Additional scientific data in this geographic area Quaternary volcanic flow rocks, unit 1 (Cascade Volcanic Field) (Quaternary) at surface, covers 37 % of this area Quaternary volcanic flow rocks; minor pyroclastic deposits; in part Pliocene and Miocene. Franciscan rocks have a complex geological structure. The Upper Klamath Basin and the Modoc Plateau are large land forms that characterize the southern portion of the ecoregion. Basalt flows, flow breccia, and basaltic peperite; minor andesite flows; some interbeds of tuff and tuffaceous sedimentary rocks. Gas was first consumed in Stockton in the 1850s and the massive Rio Vista gas field was discovered in 1936. Deccan Traps in India. Volcanism continued through the Holocene, forming the 300 foot thick basalts of the Cima Volcanic Field or the Barstow-Amboy axis of volcanic craters, which have protected underlying granite from erosion. Interactive map of the geology of California | American Geosciences According to the Soil Survey for the Intermountain Area of California, ten soil mapping units have been delineated within the vicinity of the McArthur Swamp Property (see TableVI-1). 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. Geolex Ione publications - USGS The western pond turtle is listed as an endangered species in Washington, although it has more robust populations in the Oregon and California portions of its range. Granite plutons emplaced during the Jurassic and Cretaceous, forming rock units like the Ironside Mountain diorite, which outcrops for 37 miles from the Orleans Mountain lookout tower to the line between Humboldt County and Siskiyou County or the Shasta Bally batholith at Buckhorn Summit west of Redding. Many of the ash--flow tuffs exhibit flow features and only obscure vitro-clastic textures. It formed as a sandspit filled in to the north from sediment deposited by the Tijuana River and sheltered from wind and waves by the Cretaceous uplands of Point Loma. Oil drilling in the Wilmington field cause up to 30 feet of subsidence at the eastern end of Terminal Island between 1937 and 1958. [18]. [Age is early Tertiary (Eocene).] 896, p. 1018-1019). Geologists group the plutons of the Peninsular Ranges as the Southern California batholith, which includes several large individual plutons like the San Marcos Gabbro, Woodson Mountain Granodiorite or Bonsall Tonalite. The Golden State includes both the highest and lowest point in the continental US and practically every conceivable geological feature known. 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. Volcanic rocks erupted around Barstow in the Triassic. This unit corresponds with unit Tb on the 1978 State map. Recent lava flows comprise approximately 60 percent of this complex and are characterized by sharp, jagged, broken blocks piled in tumbled heaps and have many crevices, sinkholes, and collapsed lava tubes. The River | Fall River Conservancy This area lies along the northwestern-most flank of the Sierra Nevada Geomorphic Province. Several potassium-argon ages ranging from about 4 to 7 Ma indicate unit is mostly of early Pliocene and late Miocene age. Quaternary volcanic flow rocks; minor pyroclastic deposits; in part Pliocene and Miocene. The monument, established in 1925, includes the sites of many important battles of the Modoc Indian War of 1872-73. Forestry Technician (Lassen NF), The Great Basin Institute, United During the Jurassic high sea levels retreated, switching to the deposition of the terrestrial Aztec sandstone. It's a Other size geocache, with difficulty of 1.5, terrain of 1.5. . Major uplift was going on in Pleistocene, with some marine terraces raised 1000 feet. The Modoc Plateau is a mile-high expansive prehistoric lava flow, with areas of sparse vegetation, rough broken lava rock, juniper trees, and sagebrush flats in a semi-arid region covering about a half-million acres. The soils are not considered Prime Farmland and have a Capability Class rating of IV (NRCS, 2000). Oil was first extracted in 1850 from the Pico Canyon field, close to Newhall with larger-scale production by 1875. The soils are moderately to strongly alkaline and have a very high shrink-swell potential (refer to TableVI-1). Non-seismic hazards addressed in the document include volcanoes, erosion, and expansive soils. Like the Sierra Nevada, the Peninsular Ranges have gentle western slopes and steep eastern faces. Most precipitation accumulates from November through April. Based on faulting in recent alluvial material, the Surprise Valley fault zone is still active. The County Environmental Health Department would act as the monitoring body to ensure compliance with the permit. Contribute to chinapedia/wikipedia.en development by creating an account on GitHub. The Bowman Ditch is located on soils mapped as the Pastolla Muck, drained, zero to two percent slopes. In Washington and the rapidly developing areas around Bend in Oregon, timber companies have recently begun to sell their lands in the mid-elevation forest and transition zones to developers. Hot springs including San Jacinto, Eden, Saboba and Gilman are active in the San Jacinto Mountains due to the presence of the San Jacinto fault zone and Elsinore was founded on its hot springs. Cascades & Modoc Plateau Geology - YouTube They have a low hazard from water and wind erosion when exposed. Partly coeval with the Saddle Mountains Basalt of the Columbia River Basalt Group (Swanson and others, 1979), Thin, commonly open-textured (diktytaxitic), subophitic to intergranular olivine basalt flows, intercalated with and grades laterally through palagonite breccia and tuff into tuffaceous sedimentary rocks (unit Ts). The Modoc Plateau is characterized as a transitional region between the Basin and Range Geomorphic Province to the east and the Cascade Range Geomorphic province to the west and north. Therefore, a less-than-significant impact is expected. The Alquist-Priolo Earthquake Fault Zoning Act (formerly the Alquist-Priolo Special Studies Zone Act), signed into law December 1972, requires the delineation of zones along active faults in California. The geologic information, particularly for the Klamath Mountains, Modoc Plateau, and northern Sierra Nevada, has been updated to reflect the more recent geologic understanding of these complex areas. In the 1960's, NASA astronauts trained for future moon landings in the pumice fields of the highlands. These soils have a Capability Class rating of III to IV and are considered Prime Farmland when irrigated (NRCS, 2000). Initially, hydraulic mining was used to get at placer deposits, but it destroyed the landscape and choked rivers with sediments, ultimately being banned the California government in 1884. Virtually all of the islands in the bay are man-made from dredged sediments. It is in northeastern California about 50 km (31 mi) south of Klamath Falls, Oregon. Drillhole data indicate that the plateau surface underlying the volcano has been downwarped by 0.5 kilometer under its center. 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. Borehole Conditions The vault is a horizontal tunnel, located beneath 5 meters of overburden to maintain thermal stability. The McArthur Swamp, Bowman Ditch, and the Ahjumawi Property are located within or adjacent to the McArthur Fault-Rupture Zone. Flows like water in many cases. Whitebark pine (Pinus albicaulis), lodgepole pine, and western larch (Larix occidentalis) are common components of many of these forests. 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. As discussed in Section1.0, Project Description, no development is proposed that would eventually be utilized for human occupancy. These soils are very deep (greater than 60 inches), very poorly drained, and mucky with slow permeability. Share sensitive information only on official, secure websites. US 97: Weed-Oregon 294. Identify Priority Places: A Practitioner's Guide, Cumberlands and Southern Ridge and Valley, Willamette Valley-Puget Trough-Georgia Basin. Policy SG-d - Shasta County shall develop and maintain standards for erosion and sediment control plans for development. Reviews aren't verified, but Google checks for and removes fake content when it's identified. Roadside Geology of Northern and Central California, "Second Edition", 2016, Alt/Hyndman Roadside Geology of Oregon, "Second Edition", 2016, Marli B. Miller In the southern part of the range, between the Nacimiento and San Andreas fault zones, the metamorphic rocks and granite plutons of the Salinian block make up the basement rock. They are bounded on the north by the Modoc Fault, which runs from Lake Murray to Georgia. Additionally, the banks of the levees could experience localized landslides and slumps. Shelf and slope deposits would ultimately become Great Valley rocks, while the trench deposits became the Franciscan subduction complex. California has 435 recognized alliances and within those more than 1,200 vegetation associations exist. For those that did not, or used other generalized terms for Quaternary rocks, the unit Qal has been used for the general undivided alluvium. Areas in the central portion of the northern half of the property contain the Henhill Silt Loam, partially drained, 0 to 2 percent slopes mapping unit. Includes older alluvium and related deposits of Piper (1942), Willamette Silt (Allison, 1953; Wells and Peck, 1961), alluvial silt, sand, and gravel that form terrace deposits of Wells and others (1983), and Gresham and Estacada Formations of Trimble (1963). The plateau is capped with scattered small, young cinder cones and basalt flows. Adherence to standard grading practices as required by the grading permit would ensure that the impacts from erosion would be less-than-significant. 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. Use the interactive map to zoom smoothly from a national view to state and local perspectives anywhere across the country. The California Geological Survey's interactive geological map allows users to identify the different rock types and fault lines throughout California. It is present on the Washoe North, Washoe South, Lincoln, Clark, Elko, Eureka, Humboldt, Nye South, and Lander County maps. Forestry Technician (Lassen NF) | Natural Resources Job Board Soils located on the Ahjumawi Property consist of the Pastolla muck, 0 to 1 percent slopes, which are similar to those located along the Bowman Ditch, except that it is not artificially drained (NRCS, 2000). Warner Mountains : Climbing, Hiking & Mountaineering - SummitPost To determine the nature of the differences between northern and southern Arizona, geologists could: map the geology in detail, take seismic profiles, study drill core, and reconstruct the geologic history between each province. California's Amazing Geology - Donald R. Prothero - 9781498707954 A few may date earlier, like the 400 million year old Mule Mountain. In the nineteenth century, mining began in the vicinity of Julian, extracting nickel and gold, in the Julian Schist. Discovering the Colorado Plateau - Bill Haggerty 2021-04-01 The Colorado Plateau is America's western treasure, home to the country's highest concentration of national parks, monuments, wilderness areas, and state parks, and a near-endless bounty of wild, stunning landscape. The plateau is cut by many north-south faults. Rainbow (Oncorhynchus mykiss) and cutthroat trout are the common cold water inhabitants. 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.

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