High Effective Customized Horse Stable Box Horse Stall Indoors With Side Door

Cost-effective Customized Horse Stable Horse Stall Indoors with Side Door​
 

Seismic activity is a significant factor in the geology of the region. The San Andreas Fault Zone (SAFZ) is located offshore near the existing and proposed sites and forms the boundary between the northwestward-moving Pacific plate and the southeastward-moving North American plate. Many of the mountains and valleys in the area exhibit this NW-SE trend as the two plates slide past one another; studies in the western portion of the Point Reyes Peninsula located northwest of the equestrian sites have shown that rocks have been displaced approximately 94 miles over the past 11-12 million years (Marin County CDA 2005). In addition, a number of other active faults (defined by Alquist-Priolo as having ruptured during Holocene times) associated with the SAFZ also dissect the region; these include the HaywardRodgers Creek, Calaveras, San Gregorio, Concord-Green Valley, Greenville and Mount Diablo faults. All of Marin County is classified as within an Alquist-Priolo Earthquake Fault Zone (California Geological Society 2010) indicating that there is a significant likelihood of future earthquake activity. It is probable that the equestrian sites will be affected by such events, either directly through ground shaking or indirectly through landsliding, liquefaction or other geologic hazards. The numerous active faults associated with the SAFZ pose a significant threat to lives and property in the event of an earthquake and resulting potential for landslides and liquefaction (Marin County 1994). Earthquakes can result in significant damage to man-made structures. The strength of an earthquake is generally measured two different ways. One method is based on actual energy released, or magnitude, for which the Richter scale is commonly used. The second method is an arbitrary measure based on observed damage resulting from a quake, or intensity, for which the Modified Mercalli scale (ranging from I-XII) is used to classify the quake. Historic records indicate that there have been several large earthquakes along numerous faults that have caused significant damage in the vicinity of proposed equestrian sites; these are outlined in Table 3-1 below.

Paleontological resources include fossil plants and animals as well as other evidence of past life, such as preserved animal tracks and burrows. Some sedimentary geologic strata in the region are known to contain fossils. According to a 2007 NPS study of paleontological resources for the Golden Gate National Recreation Area, three marine rock terrains of the Franciscan Complex have the potential to contain fossils: inter-bedded chert deposits, limestone from preserved seamounts and continental margin turbidities deposits of sandstone, conglomerate and shale (NPS 2007). However, a records search of the Berkeley Natural History Museum (BNHM) Paleontological Database did not identify any site-specific recorded fossil localities in or near the proposed equestrian sites (BNHM 2010). While the BNHM search does not negate the presence of paleontological resources in the proposed project sites, it does indicate that fossils of significance are unlikely to be present given the local geologic conditions and the lack of other noteworthy finds in the area.

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