modoc plateau geology

California s geology makes headlines when faults shift, volcanoes puff steam, and coastal bluffs fall into the sea. US 97: Weed-Oregon 294. wikipedia.en/Outline_of_California.md at main - github.com Lava Beds National Monument contains the best examples of these, although numerous locations boast similar features, such as the Ahjumawi Lava Springs. 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). The Oldest Rocks: The Piedmont and Blue Ridge In the 1960's, NASA astronauts trained for future moon landings in the pumice fields of the highlands. 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. 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. They have a low hazard of erosion by water and a moderate erosion hazard from wind in exposed, bare areas. GitHub export from English Wikipedia. Groundwater quality in the 39,000-square-kilometer Cascade Range and Modoc Plateau (CAMP) study unit was investigated by the U.S. Geological Survey (USGS) from July through October 2010, as part of the California State Water Resources Control Board (SWRCB) Groundwater Ambient Monitoring and Assessment (GAMA) Program's Priority Basin Project (PBP). 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 rocks of eastern California formed a shallow continental shelf, with massive deposition of limestone during the Paleozoic, and sediments from this time are common in the Sierra Nevada, Klamath Mountains and eastern Transverse Range. Nearly 1,000,000 acres (400,000 ha) of the Modoc National Forest are on the plateau between the Medicine Lake Highlands in the west and the Warner Mountains in the east. On this Wikipedia the language links are at the top of the page across from the article title. Map unit used in all counties for recent lake beds, playas, and flood plains. This produced major crustal stretching, volcanism and displacement of up to 125 miles. 12201 Sunrise Valley Drive Reston, VA 20192, Region 2: South Atlantic-Gulf (Includes Puerto Rico and the U.S. Virgin Islands), Region 12: Pacific Islands (American Samoa, Hawaii, Guam, Commonwealth of the Northern Mariana Islands). 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 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. NGMDB Product Description Page Some soils are found in each property while others are more or less restricted to one portion of the property. Major Pierson Reading found gold in 1848 in the Trinity River near Douglas City. 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. Subalpine fir (Abies lasiocarpa), mountain hemlock (Tsuga mertensiana) and Engelmann spruce (Picea engelmannii) are found at higher elevations, with mountain hemlock replaced by Shasta red fir in the Upper Klamath Basin. All Rights Reserved. PDF DREW SILER - geologica.net 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 . Rockhounding. The Coast Range is at even higher risk for damaging landslides than other parts of coastal California due to sheared serpentinite in Franciscan basement rocks. Wetlands in the ecoregion are home to many birds including bald eagles, geese, ducks, herons, cranes, rails, and various songbirds. Site is located on private property in Modoc County, California, approximately 10 kilometers from the Oregon border and 20 kilometers from the Nevada border. 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. This 6"x9" paperback has 371 pages that are packed with detailed information about California Geology. Geologists have struggled to define its structural geology with complex sequences of deep ocean crust, upper mantle rock and tectonic melanges. Mountain goats inhabit high elevations in the central and northern part of the ecoregion in Washington, but are largely absent from the southern portion of their range, and absent from Oregon. 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. Below the bays, is the Merced Formation, with 45000 feet of marine rocks overlain by 500 feet of terrestrial sedimentary rocks and capped with more modern sediments from the Sacramento River. The geomorphology of the Sierra Nevada is comparatively recent, dating to as recently as the Quaternary. Further, DPR is bound by its General Plan with respect to Burney Falls and must conduct a CEQA review for any activities which deviate from the approved plan. Both of these provinces have substantial geothermal resource base and resource potential. and late Miocene in age (see Fiebelkorn and others, 1983), flows of Deer Butte Formation of Kittleman and others (1967), and extensive unnamed flow sequences in the Basin-Range and Owyhee Upland Provinces of southern Lake, Harney, and Malheur Counties that are younger than Steens Basalt, dated at about 15 Ma (Baksi and others, 1967) and the Owyhee Basalt, dated at about 14 Ma (Bottomley and York, 1976; see also Fiebelkorn and others, 1983), and older than 7 or 8 Ma. Roadside Geology of Northern and Central California, "Second Edition", 2016, Alt/Hyndman Roadside Geology of Oregon, "Second Edition", 2016, Marli B. Miller . The monument, established in 1925, includes the sites of many important battles of the Modoc Indian War of 1872-73. Technicians will serve vegetation management and fuels reduction efforts, supporting initiatives for healthy, productive, and resilient forest landscapes and resources. The variety of habitat types in the East Cascades has led to a unique and diverse flora and fauna. The principal geologic units in the vicinity are volcanic rocks,, which in places are highly permeable, and poorly permeable lake sedimentary deposits, all probably post-Oligocene in age. Geologic Guide to the Modoc Plateau and the Warner Mountains They are associated with the Whipp-Cupvar Complex, slightly saline, 0 to 2percent slopes mapping unit which occupies a flanking position to the south. 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. Potassium-argon ages on rocks from unit range from about 36 Ma (Swanson and Robinson, 1968) to about 20 Ma. The Mojave Desert extends into areas of Basin and Range terrain and includes some of the oldest rocks exposed at the surface in California. Geothermal systems with evidence of magmatic heat . Links to Completed Ecoregional Assessments. 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. These flyers, referred to as Geo Gems Notes, address individual parks and describe the geological features they support, explain the geological processes demonstrated by the landforms at the site and their significance, and indicate where to find the sites in each park unit. Found at high elevations mostly in the Sierra Nevada and Klamath Mountains. In Washington, much of the ecoregion is within the ceded lands and usual and accustomed fishing areas of tribes. Quaternary pyroclastic and volcanic mudflow deposits. Fountains. The volcano is positioned at a kink where northwest-trending faults entering the volcano from the south turn to the northeast, and then back to northwest. 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. Examples of rock formations in the Franciscan subduction complex include the Calera limestone east of the San Andreas fault or the Laytonville limestone which extends north of San Francisco to Eureka. Pliocene and/or Pleistocene sandstone, shale, and gravel deposits; in part Miocene. The southern portion of the ecoregion has extensive valleys and flatlands between the forested mountains and foothills, which include large marshes, irrigated meadows and pastures, and arid juniper and sagebrush steppes. Even moderate shaking . These soils formed in basins of mixed alluvium and are moderately deep, poorly drained soils with slow permeability and a high shrink-swell potential (see TableVI-1). 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. 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. Consequently, these soils will continue to remain submerged on an annual basis. SP026: Traveling America's loneliest road: A geologic and natural history tour through 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. Listed on Feb 28, 2023 Upper Klamath Lake is Oregons largest lake and is the biggest remnant of this wetland system.