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Earthquake fault trace, between Shafter and Skinner ranches, Olema. Looking northwest. There has been a relative displacement of the ground at right and left of the trace amounting to about 15 feet. The ground at left moved from the observer and ground at right moved toward the observer. Marin County, California. 1906. San Francisco Earthquake April 18, 1906. Point Reyes National Seashore.
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Album caption and index card: California earthquake. Road near Point Reyes Station, offset 20 feet by main fault; looking northwest. The shear zone is here 60 feet wide and traverses a swamp. The road was raised above the swamp by an embankment, and between the limits of the shear zone this embankment settled to the general level of the swamp, about 3 1/2 feet. Photography made April 28 before the road had been repaired. Point Reyes National Seashore,. Point Reyes quadrangle, Marin County, California. 1906. Published as plate 1-A in U.S. Geological Survey Bulletin 324. 1907. Handwritten note on album caption: Figure 313 in Introduction to Geology by E.B. Branson and W.A. Tarr.
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These data represent trapping effort and captures of deer mice at Point Reyes National Seashore, Marin County, California. Deer mice were captured and marked with ear tags to allow identification of individuals. The location of captures can be used in a spatially explicit capture recapture model to estimate density of mice and how mouse density varies by site and habitat type.
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Point Reyes National Seashore, California. Offset of the San Andreas fault at the Skinner Ranch. The 1906 scarp (marked by posts) has been eroded away. The Skinner Ranch is now the headquarters of the Point Reyes National Seashore. 1981. Page 53, Earthquake Information Bulletin, v.13, no.2.
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Point Reyes National Seashore, California. Offset fence and ground breakage at Shafter Ranch caused by the San Francisco earthquake of April 18, 1906. Photo by J.C. Branner, April, 1906. Page 20, Earthquake Information Bulletin, v.8, no.3.
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These data provide information on the relationship between California red-legged frogs and their habitat in a unique ecosystem to better conserve this threatened species while restoring habitat for rare dune plants and animals.
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Point Reyes National Seashore, California. Cracks divergent from the main fault near Skinner Ranch. 1906. Photo taken after the San Francisco earthquake of April 18, 1906.
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Point Reyes National Seashore, California. Earthquake fault, north of Skinner Ranch near Olema, looking south. 1906. Photo taken after the San Francisco earthquake of April 18, 1906.
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Point Reyes National Seashore, California. Dislocation topography about 6 miles south of Olema on the west side of the ridge, looking south. The fresh faults, formed at the time of the San Francisco earthquake of April 18, 1906, occupy lines of earlier displacement. The region has a topography allied to landslip topography and also the earthquake zone between Olema and Bolinas. 1906.
These data describe the maximum water depth in each studied coastal dune drainage in each study year. Water depth is used as a proxy for hydroperiod, and is a good indicator of the relative persistence of surface water among sites that can be collected in a single visit.
These data indicate whether a premetamorphic or any life stage of each amphibian species (sierran treefrog Pseudacris sierra, California red-legged frog Rana draytonii, and rough-skinned newt Taricha granulosa) was detected in a survey. These data, combined with the survey data, are necessary for modeling occupancy while accounting for imperfect detection. Surveys for which no detections occurred do not appear in this file, but are in the survey data file (Survey_Data_for_Occupancy_of_Amphibians_in_Northern_California_Coastal_Dune_Drainages_2014_2016).
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These data provide information on the relationship between California red-legged frogs and their habitat in a unique ecosystem to better conserve this threatened species while restoring habitat for rare dune plants and animals.
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These data represent incidental observations of western pond turtles (Emys [Actinemys] marmorata) collected by the U.S. Geological Survey, Western Ecological Research Center, at Point Reyes National Seashore and Golden Gate National Recreation Area between 1993 and 2014. These data do not have associated survey effort, and are intended to represent incidental observations, rather than a random, systematic, or exhaustive survey for western pond turtles. The data include turtle location, observation date, and observer information.
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Point Reyes National Seashore, California. Dislocation topography about 6 miles south of Olema on the west side of the ridge, looking south. The fresh faults, formed at the time of the San Francisco earthquake of April 18, 1906, occupy lines of earlier displacement. The region has a topography allied to landslip topography and also the earthquake zone between Olema and Bolinas. 1906.
These data describe the date, time (night vs. day), observer, and air temperature of each amphibian occupancy survey conducted in coastal dune drainages from 2014 through 2016. Survey-specific covariates explain patterns in detection probabilities among surveys, thereby reducing bias in occupancy models and improving future surveys.
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Occupancy models provide a reliable method of estimating species distributions while accounting for imperfect detectability. The cost of accounting for false absences is that detection and nondetection surveys typically require repeated visits to a site or multiple-observer techniques. More efficient methods of collecting data to estimate detection probabilities would allow additional sites to be surveyed for the same amount of effort, which would support more precise estimation of covariate effects to improve inference about underlying ecological processes. Time-to-detection surveys allow the estimation of detection probability based on a single site visit by one observer, and therefore might be an efficient technique...
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Point Reyes National Seashore, California. California earthquake. Main fault at the Skinner Ranch, one mile west of Olema, looking northwest. The fence had been repaired. The fault passes under the barn to the right of center. While the main part of the barn remained on its foundation, the shed on the right was dragged 15 feet due to the San Francisco earthquake of April 18, 1906. Mr. Harold W. Fairbanks. Marin County, California. May 12, 1906.
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California Red-legged Frogs (Rana draytonii) are typically regarded as inhabitants of permanent ponds, marshes, and slow-moving streams, but their ecology in other habitats, including coastal dunes, remains obscure. To avoid and minimize potential negative effects of dune restoration activities, we studied the spatial ecology, habitat selection, and survival of California Red-legged Frogs in coastal dune drainages at Point Reyes National Seashore, California. Frogs remained in their home drainages throughout the summer, and, with some notable exceptions, most remained close to water. Home ranges of California Red-legged Frogs in dunes were generally small, and they selected areas near water with logs that served...
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Point Reyes National Seashore, California. Trench developed on the medial ridge at Skinner Ranch in 1906, which by 1981 has been modified to form a bench on the hillside. Page 57 (lower photo), Earthquake Information Bulletin, v.13, no.2.
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Point Reyes National Seashore, California. Dislocation topography about 6 miles south of Olema on the west side of the ridge, looking south. The fresh faults, formed at the time of the San Francisco earthquake of April 18, 1906, occupy lines of earlier displacement. The region has a topography allied to landslip topography and also the earthquake zone between Olema and Bolinas. 1906.
map background search result map search result map Point Reyes National Seashore, California. Offset fence and ground breakage at Shafter Ranch caused by the San Francisco earthquake of April 18, 1906. Offset of the San Andreas fault at the Skinner Ranch. Point Reyes National Seashore, California. 1981. Trench developed on the medial ridge at Skinner Ranch in 1906, which by 1981 has been modified to form a bench on the hillside. Point Reyes National Seashore, California. No date. Effects along the fault trace. San Francisco, California, Earthquake April 18, 1906. Main fault at the Skinner Ranch. San Francisco 1906 Earthquake. Point Reyes National Seashore, Marin County, California. 1906. Earthquake fault trace, between Shafter and Skinner ranches, Olema. Marin County, California. 1906. Point Reyes National Seashore, California. Dislocation topography about 6 miles south of Olema on the west side of the ridge, looking south. 1906. California Red-Legged Frogs in Point Reyes Coastal Dune Drainages (2015) Habitat Observations for California Red-Legged Frogs in Point Reyes Coastal Dune Drainages (2015) Movement of California Red-Legged Frogs in Point Reyes Coastal Dune Drainages (2015) Time to detection data for Point Reyes pond-breeding amphibians, 2017 Western Pond Turtle (Emys [Actinemys] marmorata) Observations at Point Reyes National Seashore and Golden Gate National Recreation Area Captures and Trapping Effort for Deer Mice (Peromyscus sonoriensis) at Point Reyes National Seashore, California, USA from 2021 to 2022 California Red-Legged Frogs in Point Reyes Coastal Dune Drainages (2015) Habitat Observations for California Red-Legged Frogs in Point Reyes Coastal Dune Drainages (2015) Movement of California Red-Legged Frogs in Point Reyes Coastal Dune Drainages (2015) Offset of the San Andreas fault at the Skinner Ranch. Point Reyes National Seashore, California. 1981. Trench developed on the medial ridge at Skinner Ranch in 1906, which by 1981 has been modified to form a bench on the hillside. Point Reyes National Seashore, California. No date. Main fault at the Skinner Ranch. San Francisco 1906 Earthquake. Point Reyes National Seashore, Marin County, California. 1906. Point Reyes National Seashore, California. Dislocation topography about 6 miles south of Olema on the west side of the ridge, looking south. 1906. Captures and Trapping Effort for Deer Mice (Peromyscus sonoriensis) at Point Reyes National Seashore, California, USA from 2021 to 2022 Time to detection data for Point Reyes pond-breeding amphibians, 2017 Effects along the fault trace. San Francisco, California, Earthquake April 18, 1906. Earthquake fault trace, between Shafter and Skinner ranches, Olema. Marin County, California. 1906. Western Pond Turtle (Emys [Actinemys] marmorata) Observations at Point Reyes National Seashore and Golden Gate National Recreation Area Point Reyes National Seashore, California. Offset fence and ground breakage at Shafter Ranch caused by the San Francisco earthquake of April 18, 1906.