Reading the ESRT Eon Precambrian Is split into

Reading the ESRT

Eon: Precambrian Is split into the: Archean and Proterozoic 1. When was the first oxygen produced? Late archean 2. Which organism produced it? Cyanobacteria or blue green algae 3. When did oceanic oxygen first enter the atmosphere? Early proterozoic 4. When did the first sexually reproducing organisms evolve? Middle proterozoic 5. How many years does one Represent? 500 million years

Eon: the Phanerozoic 1. What does one represent? 100 million years 2. Which three era’s make up the phanerozoic? Paleozoic, Mesozoic, Cenozoic

First Life forms: What were they? Stromatolites Which time period? Middle Proterozoic they are Abundant, Evolved Early Archean

The Paleozoic: Ancient Life… 1. Is there a rock record in NY State for this era in Earth’s geologic history? Yes for the most part 2. How old is the coal we burn today? Which time period did it form in? 300 million years Old, Pennsylvanian Carboniferous

The Mesozoic: Middle Life 1. Which life forms dominated the Jurassic period? The Dinosaurs and ammonoids 2. Which events marked the beginning and end of this time period? 2 Mass Extinctions

When did humans (similar to us) appear on the planet? During the Pleistocene- Quarternary Time period around 400, 000 thousand years ago – Homo sapiens Hominid (human like) species evolved around 5 mya

Index fossils: the remains of an organism that was widespread geographically, but lived for a short geologic time period… 1. Which index fossil marked the Quaternary? There are three… O=Beluga Whale and Mastodont S= Condor

Index fossils A, B, and C belong to which family? Trilobites When did they become extinct? End of the Permian Can they be found in the bedrock around NY State? Where? Yes, the Allegheny Plateau, Erie-Ontario Lowlands, St. Lawrence Lowlands, Hudson Mohawk Lowlands

When did the last continental ice retreat? During the Quaternary Period , Pleistocene Epoch , 10, 000 ya

The highest point in NY…

Which family of organisms existed for the shortest time period? Placoderm Fish (Armored Fish)

The Taconian Orogeny… Occurred during the Ordovician Period

Which landscape regions were formed during the Taconian Orogeny in NY State? Manhattan Prong, Taconic Mts, and Hudson Highlands

Where was North America at the time of the Taconian Orogeny? On the equator

Try these: 1 1. ______ Eurypterid fossils are abundant in the Bertie dolostone, a sedimentary rock layer found in western New York State. The presence of both the eurypterids and the dolostone indicates that, during the formation of this rock layer, this region of New York State was (1) covered by evaporating shallow seas (2) uplifted and eroded (3) buried beneath lava flows (4) intensely metamorphosed 2 2. _____The division of Earth’s geologic history into units of time called eons, eras, periods, and epochs is based on (1) absolute dating techniques (2) fossil evidence (3) climatic changes (4) seismic data

3 3. _____Which statement is best supported by the fossil record? (1) Fossils are found in nearly all rocks. (2) Fossils are found only in areas that were once under water. (3) Most early life-forms that left fossil remains are now extinct. (4) Most early life-forms that left fossil remains still exist today 4. _____The map below shows the 4 location of Grenville-age bedrock found in the northeastern United States. In which New York State landscapes is Grenville-age bedrock exposed at Earth’s surface? (1) Erie-Ontario Lowlands and St. Lawrence Lowlands (2) Catskills and Allegheny Plateau (3) Tug Hill Plateau and Atlantic Coastal Plain (4) Hudson Highlands and Adirondack Mountains