Boltz Lake Fishing Report, Articles M

From inside the book . Tertiary pyroclastic and volcanic mudflow deposits. Therefore, aside from naturally occurring erosional processes, no impact is anticipated. Modoc Plateau, and West Cascades Ecoregional Assessments. The plateau supports large herds of Mule Deer (Odocoileus hemionus), Rocky Mountain Elk (Cervus canadensis), and Pronghorn (Antilocapra americana). In the Shoo Fly complex, the Bullpen Lake sequence has bedded cherts and cooled pillow lava that closely resembles rocks found on flat-topped offshore volcanic guyots, suggesting a deep-sea origin for the base of the Sierras sometime before the Devonian. The San Onofre Breccia also formed during this period with distinct glaucophane schist, gabbro, limestone and greenschist. The Whipp-Cupvar Complex, 0 to 2 percent slope soils occupy the central, northern portion of the southern half of the site. Sandstone, shale, and conglomerate; in part Miocene and Eocene. 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. The combination of these processes and volcanic activity created rugged ridges extending southeast to east from the Cascade crest. Better run fast! In some places they are interbedded with shale, limestone and radiolarian chert. Geologic guide to the Modoc Plateau and the Warner Mountains : annual field trip guidebook of the Geological Society of Sacramento, 1980. Oil was first extracted in 1850 from the Pico Canyon field, close to Newhall with larger-scale production by 1875. These mapped faults include the McArthur, Mayfield, Pittville, Hat Creek, and Rocky Ledge faults; whereby the McArthur fault trends northwesterly through the site between Big Lake and Horr Pond (CDMG, 1994). The Warner Basalt is the most common rock in the plateau, bordered by the Surprise Valley fault zone that first became active in the Miocene 15 million years ago. In the northeastern corner of California, lies a massive volcanic plain known as the Modoc Plateau. In places includes flows of platy olivine andesite or basaltic andesite. 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. 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. Read more Print length 384 pages 27 Permit, which requires agreement with the USFWS and a water certification or waiver. Lake beds interbedded with volcanic ash are typical of the Cenozoic. 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). [15] NGMDB Product Description Page Reviews aren't verified, but Google checks for and removes fake content when it's identified. They have a Capability Class rating of II and are classified as Prime Farmland when properly drained and irrigated (NRCS, 2000). Very hot and fluid, but low in volatile content. Includes Pike Creek Formation of Walker and Repenning (1965), originally identified as Pike Creek Volcanic Series by Fuller (1931), and unnamed volcanic and volcaniclastic rocks of southern Lake County, some of which have been correlated with the Miocene and Oligocene Cedarville Formation of northeastern California, Lava flows, breccia, volcaniclastic and epiclastic rocks mostly of andesitic and dacitic composition; includes minor amounts of altered basaltic rocks. The tribes manage tribally-owned lands on reservations and are also involved in monitoring and research activities on ceded lands. The transfer property within the State Park is located on two constituent soil types. In the 1960's, NASA astronauts trained for future moon landings in the pumice fields of the highlands. GitHub export from English Wikipedia. Surface fault rupture is not necessarily restricted to the area within an Alquist-Priolo Zone. Roadside Geology of Northern & Central California by David D. Alt and Donald W. Hyndman Only $25.99 Learn about the Geology of California with maps, photos and expert descriptions! Axelrod (1966) reported a K-Ar age of . "Modoc County has an area of 3823 square miles. We haven't found any reviews in . Mercury was first discovered in Santa Barbara County in 1796. However, a bulge in the bay's sand spit records offshore presence of the Newport submarine canyon. Modoc Plateau. The Marble Mountain Cambrian quartzite lies unconformably atop Proterozoic granites. Its landform is volcanic table land ranging from 4,000 to 6,000 feet above sea level, cut by many northsouth faults. They have a moderate to high hazard of erosion by water and a low to moderate erosion hazard from wind in exposed, bare areas (refer to TableVI-1). The California Coast Ranges extend from the Oregon line southward 600 miles to the Santa Ynez River. Share sensitive information only on official, secure websites. During the Jurassic, many sediments shed into the region from the rising proto-Sierra Nevada. Pillow structures from rapid cooling water indicate underwater volcanism that produced basalt, andesite and diabase flows during the Miocene. Many of these schists, like the Condrey Mountain schist are more resistant to erosion than other rocks close by. The low shield shape, central caldera, and dominance ofmaficlavas are similar to Newberry Volcano of central Oregon, also located in anextensionaltectonicenvironment east of the Cascade arc axis. Five Holocene Faults including the McArthur, Mayfield, Pittville, Hat Creek, and Rocky Ledge faults are all located within 20 miles of the property. 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. All of these rocks were uplifted in the Pleistocene at the same time as the Coast Range orogeny, formed an anticlinal arch or tilted block against the Santa Ynez fault in the north. The plateau is thought to have been formed approximately 25 million years ago. As indicated by Special Publication 42, Fault-Rupture Zones in California, each of the transfer properties are located in areas with delineated fault-rupture zones. Magma Formation - University of Oregon 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 Stockton fault and White Wolf fault by Bakersfield are both major tectonic features. Appendix MP. The Modoc Plateau Region - UC Santa Barbara Thick sequences of marine rocks from the Late Cretaceous through the Paleocene and Eocene are common in the mountains and on San Miguel Island. Quaternary pyroclastic and volcanic mudflow deposits. Basalt flows, plugs and dikes, some olivine basalt, and andesite and latitic rocks. The Foothill Metamorphic Belt likely came ashore as an island arc terrane, colliding with the edge of North America to the west of the current Melones fault zone. Geology of Petroglyph Point, Lava Beds, California - YouTube 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). This unit corresponds with unit Tb on the 1978 State map. These soils formed in basins from fine-textured alluvium from extrusive and basic igneous rock. Historically, fires occurred at irregular intervals from under 10 years in the lowland foothills to 150 years or more at high elevations. Therefore, it is located within a zone of crustal weakness that likely provides a preferred pathway formagmasto reach the surface; the regional fault trends are the primary control onventlocations. The Colorado Plateau, also known as the Colorado Plateau Province, is a physiographic and desert region of the Intermontane Plateaus, roughly centered on the Four Corners region of the southwestern United States. The Lava Flows-Gassaway Complex, 2 to 15 percent slopes map unit is found along the northeastern shoreline of Big Lake at the northeastern edge of the site. It represents an ancient forearc basin that took shape as oceanic crust subducted under the west edge of the continent. 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. Polygons from the 1978 State map unit Qp were added where no playa was shown on the county maps. Several Quaternary and Holocene faults are located within a 60-mile radius of the site. Forest stand patterns on the landscape often reflect this complex fire history. 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. 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. These soils developed in basins from stratified alluvium of ash and lacustrine deposits. Pahoehoe vs. aa lavas. The Transverse Ranges are poorly drained by streams, but subject to periodic intense flooding, typically every 20 to 25 years. Gassaway soils occur approximately 30percent of the complex and have formed from eolian deposits in pockets of the broken Lava Flow lands. Modoc Plateau: Average elevation 1370 m (4500 feet) Predominant rocks: Late Cenozoic volcanics, especially basalts in the Modoc Plateau, andesites and dacites in the Cascades Plate tectonic setting: Andean-style volcanic arc in the Cascades, Basin and Range volcanoes in the Modoc Plateau Most recent eruptions: Lassen, 1914-1921 [7], The Klamath Mountains formed as small island arc terranes accreted against the coast of North America before and during the Devonian and overlain by newer rocks, deposited from the Cretaceous to modern times. . The largest wild population in Washington occurs within the ecoregion in the Columbia River Gorge. [16]. Elevations vary from 650 to 1300 feet and the bedrock consists of sandstone, siltstone, shale, some limestone and coal. In places includes interlayers of silicic volcaniclastic rocks and tuffaceous sedimentary rocks. 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. 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. By contrast, the Trinity ophiolite is found in the east, known for its numerous ultramafic rocks and being one of the most extensive ophiolites in the US. Potassium-argon ages on rocks from unit range from about 36 Ma (Swanson and Robinson, 1968) to about 20 Ma. Sign in with your username (email address) and password. [1] It has cinder cones, juniper flats, pine forests, and seasonal lakes. California s geology makes headlines when faults shift, volcanoes puff steam, and coastal bluffs fall into the sea. In addition, the McArthur Swamp area could be affected by regional volcanic events originating within the Mt. Roadside Geology of Northern and Central California - eBay Hill (1915) published a sketch map of the geology of.the High-grade mining district, a small gold district in the north Warner Mountains. The plateau consists of a thick accumulation of lava flows and tuff beds along with many small volcanic cones. Proposal Type: Mandatory Revision Course is being updated for periodic review. However some areas are virtually devoid of vegetation, due to deficient nutrient supplies (NRCS, 2000). The western portions of Burney Falls are underlain by Pliocene nonmarine sedimentary rock, comprised chiefly of diatomite, which was deposited in a lacustrine setting. Geology - 156 pages. 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. PDF Modesto Junior College Course Outline of Record Report Project work may include post fire recovery efforts. Yields and specific capacities of -wells in the unconfined water body within volcanic rocks and lake deposits range widely . In southeast Oregon many domal complexes younger than 11 Ma exhibit a well-defined southeast to northwest age progression (Walker, 1974; MacLeod and others, 1976) from about 11 Ma to less than 1 Ma, Additional scientific data in this geographic area. Holocene faults such as the, McArthur, Mayfield, Pittville, Hat Creek, and Rocky Ledge faults are located within a 20-mile radius of the site. They have a low hazard from water and wind erosion when exposed. There is a dramatic moisture gradient across the ecoregion as the precipitation diminishes from the cold, wet Cascade crest (up to 120 inches of precipitation per year) to the warm, dry eastern border with the Columbia Plateau and Great Basin (less than 20 inches per year). They are associated with the Whipp-Cupvar Complex, slightly saline, 0 to 2percent slopes mapping unit which occupies a flanking position to the south. PDF East Cascades - Modoc Plateau and West Cascades - Conservation Gateway