What is Quaternary alluvium? What is Holocene mud? Which rock type shown on the map in Figure 1 is probably the most rigid and most consolidated? Which rock type shown on Figure 1 probably contains the most water? Which of the three sites (S1, S3 or S4) experienced the MOST shaking and how do you know?

Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
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  1. What is Quaternary alluvium? What is Holocene mud?

  2. Which rock type shown on the map in Figure 1 is probably the most rigid and most consolidated? Which rock type shown on Figure 1 probably contains the most water?

  3. Which of the three sites (S1, S3 or S4) experienced the MOST shaking and how do you know?

  4. What is the geologic unit mapped at each site: S1, S3 and S4?

  5. Based on your answers on this table, how did the underlying geologic deposits contribute to the collapse of the Nimitz freeway?

Figure 2: Three seismograms of aftershocks at
stations S1, S3, and S4
S4
S3
S1
45
55
65
75
85
95
Time (sec)
Amplitude
Transcribed Image Text:Figure 2: Three seismograms of aftershocks at stations S1, S3, and S4 S4 S3 S1 45 55 65 75 85 95 Time (sec) Amplitude
Figure 1: Simplified Geologic Map of the San
Francisco Bay Area
TREASURE IS.
MacAuthur
BAY BRIDGE
YERBA
BUENA IS.
OAKLAND
TO SAN FRANCISCO
0 1 2
3 km
MAP AREA
SACRAMENTO
Holocene Mud, 0-40m thick
STOCKTON
Quaternary Alluvium, 0-50m thick
SAN ONOAKLAND
FRANC IstO
Fransiscan Formation - Sandstone and Shale
with Greenstone, Chert, Limestone,
Conglomerate, and Metamorphic Rocks
SAN JOSE
Nimitz-
Transcribed Image Text:Figure 1: Simplified Geologic Map of the San Francisco Bay Area TREASURE IS. MacAuthur BAY BRIDGE YERBA BUENA IS. OAKLAND TO SAN FRANCISCO 0 1 2 3 km MAP AREA SACRAMENTO Holocene Mud, 0-40m thick STOCKTON Quaternary Alluvium, 0-50m thick SAN ONOAKLAND FRANC IstO Fransiscan Formation - Sandstone and Shale with Greenstone, Chert, Limestone, Conglomerate, and Metamorphic Rocks SAN JOSE Nimitz-
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