Angela Jayko
Dr. Jayko is a Scientist Emeritus at the Geology, Minerals, Energy, and Geophysics Science Center at the U.C. White Mountain Research Station. She came to the USGS in 1979 and returned as an Emeritus. She studied tectonics of convergent margin associations and most recently, she’s focused on the Plio-Pleistocene transtensive deformation.
Dr. Jayko's thesis concerned Late Mesozoic subduction. She studied tectonics of convergent margin associations with work in the continental collision complex of the French Alps, in a Paleozoic transtensive basement tectonics in eastern Australia, and in the Paleozoic fold and thrust belt of central Nevada. Most recently she’s focused on the Plio-Pleistocene transtensive deformation.
Professional Experience
1979 - Current, Geologist, U.S. Geological Survey
1995 - 1998, Chair, I.U.G.G., International Lithosphere Program
1993 - 1995, Vice chair, I.U.G.G., International Lithosphere Program
1990 - 1992, Lecturer, Victoria University Wellington, New Zealand
1978 - 1979, Geometrics, EGG, Sunnyvale, California
Education and Certifications
Ph.D., Earth Sciences, University of California, Santa Cruz, 1984 (Gilbert Fellowship 1988)
B.A., Geology, Humboldt State University, 1976
Affiliations and Memberships*
Geological Society of America, Fellow
American Geophysical Union
Science and Products
Filter Total Items: 61
The Cape Mendocino, California, earthquakes of April 1992: Subduction at the triple junction
The 25 April 1992 magnitude 7.1 Cape Mendocino thrust earthquake demonstrated that the North America—Gorda plate boundary is seismogenic and illustrated hazards that could result from much larger earthquakes forecast for the Cascadia region. The shock occurred just north of the Mendocino Triple Junction and caused strong ground motion and moderate damage in the immediate area. Rupture...
Authors
D. H. Oppenheimer, Gregory C. Beroza, G. A. Carver, L. Dengler, Jerry P. Eaton, L. Gee, F. Gonzalez, Angela S. Jayko, W.H. Li, M. Lisowski, M. Magee, G. Marshall, M. Murray, R. McPherson, B. Romanowicz, K. Satake, R. W. Simpson, P. Somerville, R. S. Stein, D. Valentine
Kinematic evidence for extensional unroofing of the Franciscan Complex along the Coast Range Fault, Northern Diablo Range, California
Franciscan metagraywacke immediately below the Del Puerto ophiolite, an outlier of the Coast Range ophiolite in the northern Diablo Range, was sheared during top‐to‐the‐east displacement on the Coast Range fault. This represents normal faulting and extensional offset. It was accompanied by attenuation of the Coast Range ophiolite and Great Valley sequence in the hanging wall along layer...
Authors
T.A. Harms, Angela S. Jayko, M. Clark Blake
Geologic map of the Willows 1:100,000 Quadrangle, California
No abstract available.
Authors
M.C. Blake, E. J. Helley, Angela S. Jayko, D.L. Jones, Henry N. Ohlin
Elevation changes
The magnitude 7.1 mainshock on April 25, 992, caused substantial changes in the elevation of the Earth's surface in the Cape Mendocino region. Precise measurements of such elevation changes aid in long-term emergency planning and are needed for engineering design and the maintenance of roads, bridges, and waterways. Such measurements also enable researchers to estimate the attitude and...
Authors
Angela S. Jayko, G.A. Marshall, G. A. Carver
Chapter 10: Shallow crustal deformation in the Pahranagat area, southern Nevada
The Pahranagat area lies in the Basin and Range Province of southern Nevada. Paleozoic rocks in the study area were folded and faulted during the Sevier orogeny and subsequently extended prior to deposition of Tertiary strata. Middle Oligocene strata overlie the Paleozoic rocks with pronounced angular unconformity and were deposited on rocks of Late Cambrian through Pennsylvanian age in...
Authors
Angela S. Jayko
Stratigraphy and tectonics of Paleozoic arc-related rocks of the northernmost Sierra Nevada, California; The eastern Klamath and northern Sierra terranes
The Eastern Klamath and Northern Sierra terranes of northern California consist of Devonian to Jurassic arc-related rocks that structurally and/or stratigraphically overlie Devonian(?) or older complexes that consist of quartzite, quartzofeldspathic sandstone, chert, and mafic and ultramafic rocks. These terranes lie within a regional belt of Paleozoic arc-related rocks that can be...
Authors
Angela S. Jayko
Deformation of the Eastern Franciscan Belt, northern California
The late Jurassic and Cretaceous Eastern Franciscan belt of the northern California Coast Range consists of two multiply deformed, blueschist-facies terranes; the Pickett Peak and Yolla Bolly terranes. Four deformations have been recognized in the Pickett Peak terrane, and three in the Yolla Bolly terrane. The earliest recognized penetrative fabric, D1, occurs only in the Pickett Peak...
Authors
Angela S. Jayko, M. Clark Blake
Metamorphic and tectonic evolution of the Franciscan Complex, northern California: Chapter 38
No abstract available.
Authors
M. Clark Blake, Angela S. Jayko, Robert McLaughlin, M.B. Underwood
Paleozoic and Mesozoic rocks of the Almanor 15' quadrangle, Plumas County, California
No abstract available.
Authors
Angela S. Jayko
Geologic terranes of coastal northern California and southern Oregon
No abstract available.
Authors
Angela S. Jayko, M. Clark Blake
Unconformity between Coast Range ophiolite and part of the lower Great Valley sequence, South Fork of Elder Creek, Tehama County, California
The South Fork of Elder Creek is located on private property about 6 mi (10 km) northwest of Paskenta, Calif. (Fig. 1). To visit this locality it is necessary to call Mr. Les Sutfin (916-824-4628) and arrange to pick up the key to the gate at his home in Corning. From the Paskenta Store, drive 3.3 mi (5.3 km) north on the Toomes Camp road to the locked gate on the north side of the road...
Authors
M. C. Blake, Jr., Angela S. Jayko, D.L. Jones, B. W. Rogers
Attenuation of the Coast Range ophiolite by extensional faulting and nature of the Coast Range "thrust," California
The late Mesozoic Coast Range ophiolite and Great Valley sequence in California were juxtaposed against the Franciscan Complex during a long tectonic history that included imbricate thrust faulting, low‐angle detachment, and high‐angle reverse faulting. Many low‐angle faults previously mapped as thrusts invariably juxtapose younger over older rocks, suggesting a normal sense of offset...
Authors
Angela S. Jayko, M. Clark Blake, Tekla Harms
Science and Products
Filter Total Items: 61
The Cape Mendocino, California, earthquakes of April 1992: Subduction at the triple junction
The 25 April 1992 magnitude 7.1 Cape Mendocino thrust earthquake demonstrated that the North America—Gorda plate boundary is seismogenic and illustrated hazards that could result from much larger earthquakes forecast for the Cascadia region. The shock occurred just north of the Mendocino Triple Junction and caused strong ground motion and moderate damage in the immediate area. Rupture...
Authors
D. H. Oppenheimer, Gregory C. Beroza, G. A. Carver, L. Dengler, Jerry P. Eaton, L. Gee, F. Gonzalez, Angela S. Jayko, W.H. Li, M. Lisowski, M. Magee, G. Marshall, M. Murray, R. McPherson, B. Romanowicz, K. Satake, R. W. Simpson, P. Somerville, R. S. Stein, D. Valentine
Kinematic evidence for extensional unroofing of the Franciscan Complex along the Coast Range Fault, Northern Diablo Range, California
Franciscan metagraywacke immediately below the Del Puerto ophiolite, an outlier of the Coast Range ophiolite in the northern Diablo Range, was sheared during top‐to‐the‐east displacement on the Coast Range fault. This represents normal faulting and extensional offset. It was accompanied by attenuation of the Coast Range ophiolite and Great Valley sequence in the hanging wall along layer...
Authors
T.A. Harms, Angela S. Jayko, M. Clark Blake
Geologic map of the Willows 1:100,000 Quadrangle, California
No abstract available.
Authors
M.C. Blake, E. J. Helley, Angela S. Jayko, D.L. Jones, Henry N. Ohlin
Elevation changes
The magnitude 7.1 mainshock on April 25, 992, caused substantial changes in the elevation of the Earth's surface in the Cape Mendocino region. Precise measurements of such elevation changes aid in long-term emergency planning and are needed for engineering design and the maintenance of roads, bridges, and waterways. Such measurements also enable researchers to estimate the attitude and...
Authors
Angela S. Jayko, G.A. Marshall, G. A. Carver
Chapter 10: Shallow crustal deformation in the Pahranagat area, southern Nevada
The Pahranagat area lies in the Basin and Range Province of southern Nevada. Paleozoic rocks in the study area were folded and faulted during the Sevier orogeny and subsequently extended prior to deposition of Tertiary strata. Middle Oligocene strata overlie the Paleozoic rocks with pronounced angular unconformity and were deposited on rocks of Late Cambrian through Pennsylvanian age in...
Authors
Angela S. Jayko
Stratigraphy and tectonics of Paleozoic arc-related rocks of the northernmost Sierra Nevada, California; The eastern Klamath and northern Sierra terranes
The Eastern Klamath and Northern Sierra terranes of northern California consist of Devonian to Jurassic arc-related rocks that structurally and/or stratigraphically overlie Devonian(?) or older complexes that consist of quartzite, quartzofeldspathic sandstone, chert, and mafic and ultramafic rocks. These terranes lie within a regional belt of Paleozoic arc-related rocks that can be...
Authors
Angela S. Jayko
Deformation of the Eastern Franciscan Belt, northern California
The late Jurassic and Cretaceous Eastern Franciscan belt of the northern California Coast Range consists of two multiply deformed, blueschist-facies terranes; the Pickett Peak and Yolla Bolly terranes. Four deformations have been recognized in the Pickett Peak terrane, and three in the Yolla Bolly terrane. The earliest recognized penetrative fabric, D1, occurs only in the Pickett Peak...
Authors
Angela S. Jayko, M. Clark Blake
Metamorphic and tectonic evolution of the Franciscan Complex, northern California: Chapter 38
No abstract available.
Authors
M. Clark Blake, Angela S. Jayko, Robert McLaughlin, M.B. Underwood
Paleozoic and Mesozoic rocks of the Almanor 15' quadrangle, Plumas County, California
No abstract available.
Authors
Angela S. Jayko
Geologic terranes of coastal northern California and southern Oregon
No abstract available.
Authors
Angela S. Jayko, M. Clark Blake
Unconformity between Coast Range ophiolite and part of the lower Great Valley sequence, South Fork of Elder Creek, Tehama County, California
The South Fork of Elder Creek is located on private property about 6 mi (10 km) northwest of Paskenta, Calif. (Fig. 1). To visit this locality it is necessary to call Mr. Les Sutfin (916-824-4628) and arrange to pick up the key to the gate at his home in Corning. From the Paskenta Store, drive 3.3 mi (5.3 km) north on the Toomes Camp road to the locked gate on the north side of the road...
Authors
M. C. Blake, Jr., Angela S. Jayko, D.L. Jones, B. W. Rogers
Attenuation of the Coast Range ophiolite by extensional faulting and nature of the Coast Range "thrust," California
The late Mesozoic Coast Range ophiolite and Great Valley sequence in California were juxtaposed against the Franciscan Complex during a long tectonic history that included imbricate thrust faulting, low‐angle detachment, and high‐angle reverse faulting. Many low‐angle faults previously mapped as thrusts invariably juxtapose younger over older rocks, suggesting a normal sense of offset...
Authors
Angela S. Jayko, M. Clark Blake, Tekla Harms
*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government