A Streetcar to Subduction and Other Plate Tectonic Trips by - download pdf or read online

By Clyde Wahrhaftig

ISBN-10: 0875902340

ISBN-13: 9780875902340

ISBN-10: 1118664817

ISBN-13: 9781118664810

Published through the yank Geophysical Union as a part of the Special guides Series.

It is tough to be blind to the earth in San Francisco. equipped on rocky hills, town is surrounded on 3 aspects through bay and ocean that may be obvious from approximately all over the place inside it. Precipitous cliffs face town from around the Golden Gate, and the skyline to the north, east, and south is ruled by means of mountains. Occasional tremors from the San Andreas and comparable faults close by remind us that the earth here's energetic. till lately the rocks so abundantly uncovered in San Francisco baffled geologists. mixed in with no obvious order and missing seen fossils, they defied rationalization. the idea of plate tectonics has replaced all that. we've a proof for the beginning of the rocks of San Francisco, even though it is something yet simple.

Chapter 1 journey 1. A Streetcar to Subduction (pages 10–17):
Chapter 2 journey 2. To castle Mason and Subducted Sandstone (pages 17–19):
Chapter three journey three. Baker's seashore and castle element: a visit to Melange and Serpentine (pages 19–25):
Chapter four journey four. A Sedentary Survey of the constitution of the town (With part journeys Afoot) (pages 25–38):
Chapter five journey five. Marin Headlands: Pillow Basalt and Chert (pages 38–45):
Chapter 6 journey 6. a ship journey to the Blueschist Facies: Angel Island and the Metamorphosed Franciscan (pages 45–55):
Chapter 7 journey 7. After Subduction is Over: A BART journey to a rework Fault (pages 55–63):

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Extra resources for A Streetcar to Subduction and Other Plate Tectonic Trips by Public Transport in San Francisco

Sample text

Traced from a photograph. For locationseeFigure 24. Fartherright is IslaisCreek Basinand Industrial Park, and to the right of that, ahnosthidden behind cypresstrees,is Hunters Point--the Embedded in this sheared matrix are large and small lozenge-shapedbouldersof basalt and sandstone. 300 meters i 'i ii At the south end of the first road 500 feet southeastend of the serpentinebelt. To the eastare the hills of McLaren Park, in the melangebelt, and CandlestickHill, high and red, the southeastend of the Twin Peaks Block.

At the end of the street (2) is finegrained phyllite or semischistwith minor folds. Take the stepsand path northeastinto the park. ,,therfrom the westand branches to the east. Ta•e the northeast (left) branchover the hilltop. At (3) thiscrosses a path leading from John K. Shelley Drive to a water tower (4) on the hilltop. From the base of this tower, much of San Francis- co can be seen. To the northwest are Mt. Davidson, Mt. Sutro,the Twin Peaks,and DiamondHeights. To the north is Bernal Heights, its summit a flat slabof red chert.

Hence four side trips are included at appropriate placesfor a closer look at the rocks and their structure. History and Social Geography Although the first settlementswithin what is now San Francisco were the Presidio and Mission Dolo- res,established by the Spanishin 1776,the germ of the presentcity wasestablishedin 1832 on Yerba Buena Covejust south of Telegraph Hill. When California wasceded by Mexico to the United States in 1846, this village had a few hundred inhabitants. Upon the discoveryof gold in 1848, people poured into California from around the world, and San Franciscoexploded from lessthan 1000 people in 1848 to 34,000 in 1852 and 150,000 by 1870.

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A Streetcar to Subduction and Other Plate Tectonic Trips by Public Transport in San Francisco by Clyde Wahrhaftig

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