Late Holocene Slip Rate and Ages of Prehistoric Earthquakes along the Maacama Fault Near Willits, Mendocino County, Northern California

2014 ◽  
Vol 104 (6) ◽  
pp. 2966-2984 ◽  
Author(s):  
C. S. Prentice ◽  
M. C. Larsen ◽  
H. M. Kelsey ◽  
J. Zachariasen
Keyword(s):  
Late Holocene ◽  
Slip Rate ◽  
Northern California ◽  
Mendocino County ◽  
Prehistoric Earthquakes

"Washington is a Long Way Off": The "Round Valley War" and the Limits of Federal Power on a California Indian Reservation

2011 ◽  
Vol 80 (4) ◽  
pp. 557-596
Author(s):  
Kevin Adams ◽  
Khal Schneider
Keyword(s):  
Federal State ◽  
Coercive Power ◽  
Northern California ◽  
The West ◽  
Indian Reservation ◽  
Indian Reservations ◽  
Indian Country ◽  
Mendocino County ◽  
Indian Affairs ◽  
Local Courts

In 1887 the Office of Indian Affairs requested that the Army evict the handful of white trespassers who claimed over 90 percent of the Round Valley Reservation in Northern California. The trespassers turned to local courts to block their evictions, and a county judge dispatched the Mendocino County sheriff to arrest the federal officer who persisted with his orders. The ensuing "Round Valley War" shows that, although elites associated with Indian affairs took federal supremacy on Indian Reservations for granted, and while historians have also tended to treat the West, and "Indian Country" in particular, as a domain where federal prerogatives reigned supreme, in the aftermath of the Civil War anti-statism and Democratic localism presented effective counterclaims to the coercive power of the federal state.

Late Holocene slip rate of the San Andreas fault and its accommodation by creep and moderate-magnitude earthquakes at Parkfield, California

Geology ◽  
2011 ◽  
Vol 39 (3) ◽  
pp. 243-246 ◽  
Author(s):  
Nathan A. Toké ◽  
J Ramón Arrowsmith ◽  
Michael J. Rymer ◽  
Angela Landgraf ◽  
David E. Haddad ◽  
...  
Keyword(s):  
Late Holocene ◽  
San Andreas Fault ◽  
Slip Rate ◽  
San Andreas ◽  
Moderate Magnitude

Holocene slip rate and earthquake recurrence of the northern Calaveras Fault at Leyden Creek, northern California

1996 ◽  
Vol 101 (B3) ◽  
pp. 5961-5975 ◽  
Author(s):  
Keith I. Kelson ◽  
Gary D. Simpson ◽  
William R. Lettis ◽  
Colleen C. Haraden
Keyword(s):  
Slip Rate ◽  
Northern California ◽  
Earthquake Recurrence

scholarly journals 1855 and 1991 surveys of the San Andreas fault: Implications for fault mechanics

1994 ◽  
Vol 84 (2) ◽  
pp. 241-246
Author(s):  
Lisa B. Grant ◽  
Andrea Donnellan
Keyword(s):  
Late Holocene ◽  
San Andreas Fault ◽  
Slip Rate ◽  
Large Earthquake ◽  
Fault Mechanics ◽  
Radiocarbon Dates ◽  
Apparent Slip ◽  
San Andreas ◽  
Main Fault ◽  
Fault Trace

Abstract Two monuments from an 1855 cadastral survey that span the San Andreas fault in the Carrizo Plain have been right-laterally displaced 11.0 ± 2.5 m by the 1857 Fort Tejon earthquake and associated seismicity and afterslip. This measurement confirms that at least 9.5 ± 0.5 m of slip occurred along the main fault trace, as suggested by measurements of offset channels near Wallace Creek. The slip varied by 2 to 3 m along a 2.6-km section of the main fault trace. Using radiocarbon dates of the penultimate large earthquake and measurements of slip from the 1857 earthquake, we calculate an apparent slip rate for the last complete earthquake cycle that is at least 25% lower than the late-Holocene slip rate on the main fault trace. Comparison of short-term broad-aperture strain accumulation rates with the narrow-aperture late-Holocene slip rate indicates that the fault behaves nearly elastically over a time scale of several earthquake cycles. Therefore, slip in future earthquakes should compensate the slip-rate deficit from the 1857 earthquake.

Trench investigations through the trace of the 1980 El Asnam thrust fault: Evidence for paleoseismicity

1988 ◽  
Vol 78 (2) ◽  
pp. 979-999
Author(s):  
M. Meghraoui ◽  
H. Philip ◽  
F. Albarede ◽  
A. Cisternas
Keyword(s):  
Late Holocene ◽  
Slip Rate ◽  
Thrust Fault ◽  
Recurrence Time ◽  
Normal Faults ◽  
Tectonic Event ◽  
Vertical Movements ◽  
Radiocarbon Dates ◽  
Flood Deposits ◽  
Large Earthquakes

Abstract During the EI Asnam earthquake of 10 October 1980 (Ms = 7.3), a clear active thrust fault with left-lateral offset was observed. Three trenches have been excavated across this fault in order to determine slip rate and recurrence intervals between large earthquakes, and thus reconstruct its past activity. Exposure I was excavated in the flood area created in 1980 by a pressure ridge across the Cheliff and Fodda Rivers. Six flood deposits (silty-sandy and muddy horizons) alternating with paleosoils appear in this exposure; they are affected by normal faults associated with the main thrust fault. Assuming that every flood deposit results from a tectonic event of magnitude greater than 7, we can correlate previous flood deposits with these events. Exposures II and III display thrust faults displacing different paleosoils. We propose a sequence of reconstructions based on the thickness of the various deposits and the dip-slip of each tectonic event. The Late Holocene slip rate is 0.65 mm/yr for the dip-slip and 0.46 mm/yr for each of the horizontal and the vertical movements. Radiocarbon dates of coseismic movements indicate a rather irregular seismic activity during the past 7000 yr. Two sequences of large earthquakes around 4000 yr B.P. and around the modern age are separated with a period of quiescence. The average Late Holocene recurrence interval of large earthquakes is 1061 yr; however, during the active faulting episodes, the recurrence time varies from approximately 300 to 500 yr.

scholarly journals A 2600-yr-long paleoseismic record for the Himalayan Main Frontal Thrust (Western Bhutan)

2020 ◽  
Author(s):  
Romain Le Roux-Mallouf ◽  
Matthieu Ferry ◽  
Rodolphe Cattin ◽  
Jean-François Ritz ◽  
Dowchu Drukpa ◽  
...  
Keyword(s):  
Radiocarbon Dating ◽  
Late Holocene ◽  
Slip Rate ◽  
Historical Earthquakes ◽  
Large River ◽  
Fault Propagation ◽  
Alluvial Deposits ◽  
Seismic Slip ◽  
Fault Propagation Fold ◽  
Cumulative Deformation

Abstract. In spite of an increasing number of paleoseismic studies carried out over the last decade along the Himalayan arc, the chronology of historical and pre-historical earthquakes is still poorly constrained. In this paper, we present geomorphologic and paleoseismic studies conducted over a large river-cut exposure along the Main Fontal Thrust in southwestern Bhutan. The Piping site reveals a 30-m-high fault-propagation fold deforming late Holocene alluvial deposits. There, we carried out detailed paleoseismic investigations and built a chronological framework on the basis of 22 detrital charcoal samples submitted to radiocarbon dating. Our analysis reveals the occurrence of at least five large and great earthquakes between 485 ± 125 BC and AD 1714 with an average recurrence interval of 550 ± 211 yr. Co-seismic slip values for most events reach at least 13 m and suggest associated magnitudes are in the range of Mw 8.5–9. The cumulative deformation yields an average slip rate of 25.3 ± 4 mm/yr along the Main Frontal Thrust, over the last 2600 yr in agreement with geodetic and geomorphological results obtained nearby.

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