Answer to Question 1During the Pennsylvanian, the southwest part of the North American craton experienced deformation
as a series of fault-bounded uplifted blocks. These blocks formed the Ancestral Rockies, which were
not all elevated at the same time. Uplift of some mountains was more than 2 km along near-vertical
faults, so the overlying Paleozoic sediments were eroded and the igneous and metamorphic
Precambrian basement rocks were exposed. Tremendous quantities of eroded red sediments were
deposed in the surrounding basins.
Answer to Question 2The Absaroka sequence, from Late Mississippian to Early Jurassic, overlies the Kaskaskia sequence
from Middle Devonian to Middle Mississippian. The sequences are the result of different tectonic
regimes. The Pennsylvanian rocks have cyclothems, indicating that sea level rose and fell repeatedly.
Ice sheets on Gondwana grew and melted, causing sea level to fall and rise.
A 19-foot-long blue whale skull in the collections of the Smithsonian Museum of Natural History
Early History of the Universe
The Geologic Time Scale
Health History Assessment Questions Pertinent to Drug Administration
Created Equal: A Social and Political History of the United States, Brief Edition
Describe the Conceptual Forecasting Framework in your own words.