Geologic History and Absolute Dating Flashcards
which graptolite lived at the same time that large amounts of salt and gypsum were deposited in evaporate basins in new york
cyclograptus
fossils of extinct corals are commonly found in pennsylvania. scientists who study these coral fossils indicate that they are similar to living corals. why do these fossils provide value information about prehistoric pennsylvania
they may provide evidence that pennsylvania was once covered by warm ocean waters since most corals are presently found in these environments
which group of organisms are found only as fossils today
placoderm fish
how many million years ago was the region around current-day watertown, new york located nearest to the equator
340 mya
a fossil collector found crinoid fossils (related to sea stars and sea urchins). the collector did some research and read the information shown. what can the collector best infer about the area where the fossil was found
the area may once have been the site of an ocean
at the end of which geologic time period were the continents of south america and africa joined together and entirely located south of the equator
devonian period
which event is primarily responsible for the production of oxygen that first entered into earth’s early atmosphere
evolution of oxygen-producing organism
eurypterus fossils are most likely to be found in surface bedrock near
niagara falls
the acadian mountains were formed as a result of the collision between north america and ______
avalon
a sample of holmuim-166 is subjected to high temperature and pressure. the half-life of this sample will be
the same, 26.80
which nys landscape region is scoby hill located
allegheny plateau
carbon-14 can be used to determine the ages of both a _______
mastodon bone and a human bone
which radioactive isotope has a half-life closest to the half-life of the radioactive isotope rubidium-87
lutetium-176
one reason why carbon-14 was used to determine the age of the woolly rhinoceros tooth was because carbon-14
can be found in most organic remains
which sequence shows the order of landscape regions that are crossed as water flows through the catskill aqueduct
allegheny plateau, hudson-mohawk lowlands, hudson highlands, manhattan prong
what is the half life of carbon-14
5700 years
which two cities are located in the interior lowlands
buffalo and watertown
why was carbon-14 not used to date the trilobite fossils
they lived to long ago
which nys landscape region is mendon ponds located
erie-ontario lowlands
