Briefly describe the geologic history of the North American Cordillera. What will be an ideal response?
The history of the Cordillera is long and complex, involving accretion of island arcs along the
continental margin, orogeny at an oceanic-continental boundary, vast outpourings of basaltic lava, and
block faulting. After cessation of the Laramide orogeny, mountain ranges eroded. During the Early
Cenozoic, a subduction zone stretched off the Pacific Coast from Mexico to Alaska where the Farallon
plate was consumed. All that remains are the Juan de Fuca and Cocos plates.
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Winds at high latitudes are out of the
A) East. B) West. C) South. D) North.
The most widely separated surface weather observations come from what region on Earth?
Describe two advantages of urbanization.
What will be an ideal response?
What is the order for where you would find stream deposits starting at the headwaters and going toward the mouth?
A. silt, sand, gravel B. sand, silt, gravel C. gravel, sand, silt