peat - hand/display specimen of peat from the San Andreas fault zone, formed in a marsh that dried out roughly a century ago The pencil is 5 1/2

The pencil is 5 1/2 inches long

a chaotic assemblage of rocks that were scraped off the Farallon Plate as it subducted under the North American Plate during the late Mesozoic

so the sand delivered to the mouths of streams is frequently quartz rich

Question for students:

We have had some specimens in our collection for roughly 40 years

peat - hand/display specimen of peat from the San Andreas fault zone, formed in a marsh that dried out roughly a century ago The pencil is 5 1/2This peat was collected from a former marsh along Pallett Creek in the San Andreas fault zone, Los Angeles County, California Peat is formed by partial decomposition of plant material under acidic conditions. With burial and compression, peat forms lignite and eventually bituminous coal. At Pallett Creek, the peat was formed in a marshy sag pond in the fault zone. Layers of leaves and vegetation fell into the marsh and were subsequently covered with