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Cards In This Set
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5. From LA northward, the California coast is characterized by
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TRANSFORM AND CONVERGENT PLATE BOUNDARIES
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35. Index fossils are useful in relative geologic dating because
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THEY LIVED FOR A LONG DURATION OF TIME AND WERE FOUND WORLDWIDE
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37. The time in my since the beginning of the Paleozoic Era when organisms evolved hard parts and shells is
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540my
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The eastern slope of the Sierra Nevada is the boundary between the Sierra Nevada and the
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BASIN AND RANGE GEOLOGIC PROVINCE
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39. The origin of the Sierra Nevada as a continental volcanic arc above a subduction zone is inferred from
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A&B: THE COMPOSITION OF THE ROCKS +THE NATURE OF THE ROOF PENDANTS
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40. This main pulse of magmatic activity in the Sierra was during the
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CRETACEOUS PERIOD
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41. The main pulse of magmatic activity in the sierra stopped because
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B&C: THE MAGMATIC ACTIVITY MIRATED TO THE EAST + THE SUBDUCTING SLAB UNDER THE SIERRA SHALLOWED
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42. The main concentration of gold deposits in the Sierra occurs
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Along its western edge
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43. In the Sierra gold occurs in the placer deposits and
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LODE DEPOSITS
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45. Igneous rocks concentrate the gold because they
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PROVIDE THE HEAT AND FLUIDS FOR LEACHING, CONCENTRATION, AND REDEPOSITION OF GOLD
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44. Placer deposits of gold or any other occur
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IN SEDIMENTS AND SEDIMENTARY ROCK
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46. The property of gold that makes it suitable for mining by panning or dredging is
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ITS DENSITY
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47. Mercury was essential in gold mining because
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IT COMBINED WITH GOLD TO FORM AMALGAM AND IT WAS READILY AVAILABLE IN THE COAST RANGES
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48. Hydraulic mining influenced river systems in CA over the long term by
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USING UP ALL THE WATER AND PRODUCING EXCESSIVE SEDIMENT THAT FILLED DOWNSTREAM CHANNELS
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50. Deposits of the Great Valley Sequence include abundant examples of turbidites or accumulations of turbidity currents that typically are deposited
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IN DEEP WATER OCEAN OFF THE CONTINENTAL SHELF
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