Name ___________________ Date _____ Class Period ____
Geologic Time Scale
You will need to use the Reference Table Geologic History of New 'York State (page 8-9) to answer the questions below.
1.   Geologic time is divided into eons. Eons are are subdivided into __________ Eras are subdivided into ________   Periods are subdivided into ________
2.   The oldest eon is the __________ (Greek word for ancient)
3.   The Archean and Proterozoic eons are not subdivided into eras because there are very few fossils from that time The Phanerozoic eon is divided into
4.    What is the estimated age of the earth and solar system?
5.    What is the estimated age of the oldest known rocks? _
6.    In which period and how many years ago did the following prganisms live?
a) trilobites _____________ (period)    _____________ million years ago
b) graptolites   ___________ (period)    ____________ million years ago
7.    Describe Life on Earth that existed during the Jurassic period.
8.    The Record in~Neur York column shows the time periods for which there are rock and fossil records in NYS. A thick, black line indicates that rock or fossil evidence from that. time period can be found. It there is no line, there is no record for that time. In which period are no fossils found in New York State? (1) Ordovician     (2) Silurian        B) Devonian,      (4) Permian
9.    Tectonic Events  Affecting  Norfh«ost KorM /fmerica column uses thick, black lines to indicate the time periods during which major plate interaction occurred. Important Geologic Evefjte t'ti  KY Column evpUuvs in more detail how the plate tectonics events affected New YofK S^te
The Palisades sill was intruded during "Me late ___________ period. The Adirondacks were uplifted during the ____________ epoch.
10.  The Inferred Position of Earth's L&ndrM*S5&» column shows the changing positions of landrnasses due to plate movements
Where was North America centered during the Mississippian and Pennsylvanian periods? (North America is shown in black.)    ______________________
11.  Which era represents the shortest amount of geologic time? (1) Precarnbrian     (2) Paleozoic       (3) Mesozoic      (4) Cenozoic
12.  Geologic time is divided into units based upon
(1) erosion rates    (2) rock types      (3) surface topography     (4) fossil evidence