Compare the Taconic, Caledonian, and Acadian orogenies in terms of the tectonic forces that
caused them and the sedimentary features that resulted. What will be an ideal response?
All three orogenies relate to the closing of the Iapetus Ocean. The Late Ordovician Taconic
Orogeny in New England resulted from convergence with Laurentia; highlands shed the
Queenston clastic wedge westward onto the craton. Closing of the Iapetus in the Late Silurian-
Devonian caused the Caledonian orogeny and its North American counterpart, the Acadian
orogeny (which also involved the encroachment of Gondwana on Laurasia). Resulting orogenic
highlands shed the Catskill Delta (clastic wedge) to the west, and the Old Red Sandstone clastic
wedge to the east
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Human blood contains which of the following buffers?
A) HC2H3O2/C2H3O2- B) H2PO4-/HPO42- C) both a and b D) neither a nor b
Salts and clay minerals are formed during physical weathering
Indicate whether the statement is true or false
Compare and contrast rapid mass movements and slow mass movements. What will be an ideal response?
According to the International Union for Concerned Scientists in 2014, groups showing highest extinction risk are
A) cycads and conifers. B) birds, amphibians, and freshwater fish. C) corals and freshwater crabs. D) invasive species in general.