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GEOL 2 FINAL
Terms in this set (21)
Briefly describe what the Triassic, Jurassic, and Early Cretaceous fossil record might have been like for AL if formations of these ages were found at the surface in AL.
The fossil record consists of Dilophosaurus, Stegosaurus, Allosaurus, and Anchisaurus. These animals left tracks. There were also a variety of other new creatures such as reptiles, mammals, and cycads. It was very diverse.
Briefly describe the fossil record for Upper Cretaceous in term of fossil plants.
Upper Cretaceous plant fossils would be hazel, magnolias, and laurels. Some plants left behind leaves. Some wood was also preserved in Marion County.
Briefly describe the fossil record for Upper Cretaceous in term of marine invertebrates.
Upper Cretaceous marine invertebrate fossils consist of worm tubes, Exogyra costata, and echinoids found in Etowah formations. Lots of shell-like organisms
Briefly describe the fossil record for Upper Cretaceous in terms of marine verterbrates.
Upper Cretaceous marine vertebrates consist of sharks such as goblin and clown sharks, because of the shark teeth remains found, and fish because of the fish remains found.
Briefly describe the AL tyrannosaurs and their mode of life.
AL tyrannosaurs had less teeth than the average one. They were large dinos with small arms. Modes of life consisted of living in topical areas and were the top predator in the food chain, making them a dominant specimen.
Briefly describe the AL hadrosaurs and their mode of life.
Hadrosaurs were the first dinos found in AL. They were 24-35 feet long. No full skeletons were found, so surrounding areas were used to find shape of head. Herbivores and terrestrial animals.
Briefly describe the other AL dinosaurs and their respective modes of life.
Ornithomimids- large bird dinos, range 7-26 ft long, scrawny bones, herbivores
Dromaeosaurs- bird like features, 20 ft, carnivores
Nodosaurs- armored from back to skull, ranged from 6-9 ft, herbivores
Briefly describe the AL Cretaceous marine reptiles and their respective modes of life.
Consist of protostega, plesiosaurs, mosasaurs. Protostega was a giant sea turtle that lived in water and ate crustaceans. Plesiosaurs are large and lizard like, ate other sea life. Mosasaurs were giant lizards that were large carnivores.
Briefly describe the Wetumpka impact crater, including its age, size, and location with respect to the paleogeography of Alabama during Late Cretaceous.
Was a result of a cosmic object crashing into earth. It had the explosiveness equal to 2.6 billion tons of TNT, 1250 feet in size, and weighed 62 million tons. Located in Elmore County, all that remains is crescent-shaped ridge of hills
Briefly describe the likely ecosystem effects of the Wetumpka impact crater.
Tsunami left deposits on the land which would affect living things there. Seismic waves caused high-standing vegetation to fall around the impact crater.
Briefly describe the Chicxulub impact crater, including its age, size, and location with respect to the paleogeography of Alabama during the Late Cretaceous.
Happened in the north-western part of the Yucatan Peninsula. Asteroid was 10km and created a large blast. Stretched 1200 km. Happened 65 million years ago
Briefly describe the likely global ecosystem effects of the Wetumpka impact crater.
Global impacts were great. Acid rain, heating of the atmosphere, not enough light, global cooling, and habitat loss. These all created a huge difference in what the world would have been like at that time
What animal groups were most affected by the Chicxulub impact event? What were the main animal groups that emerged and diversified long after the Chicxulub event owing to the crater-related extinctions?
Marine and flying reptiles, ammonites, and rudists all suffered complete extinction. Mammals emerged and diversified afterward.
Briefly describe what the Eocene terrestrial environment might have been like for AL based on the fossil record of plants and animals.
Consisted of Miocene-aged sediments, Oligocene sediments and other rock groups. We know this based off fossils such as shells and clay that were found.
Briefly describe what the Eocene marine environment might have been like for AL based on the fossil record of vertebrate and invertebrate animals.
Consisted of vertebrates such as whales, alligators and stingrays. consisted on invertebrates such as snails and bivalves. There were many different creatures during this time.
Briefly describe what the Miocene marine environment might have been like for AL based on the fossil record of vertebrate and invertebrate animals.
Consisted of of great white sharks as a main predator, meaning there were not many other top predators at this time. Know this because of found shark teeth fossils. There were also small shelled organisms at this time.
Briefly describe what the Pliocene terrestrial environment might have been like for AL based on the fossil record of plants and animals.
Consisted of many different trees based on the leaves found at that time. There were also land animals such as the Elasmotherium.
Briefly describe what the Quaternary terrestrial environment might have been like for AL based on the fossil record of plants and animals.
Mammal dominated and had a wide variety of plants. Because of the great changes in temperature at the time, different plants would be alive at different times. Many plants for animals to eat.
Briefly describe the Quaternary fossil mammal record for AL based on the known fossil record before humans arrived.
There was a wide variety of mammals during the Quaternary such as sabers, bobcats, jaguars, giant ground sloth, mammoth, bison and many others.
Based on your description above, make a diagram showing which mammals were predators and which were prey.
Pred: Sabers, bobcats, jags, Prey: giant ground sloth, armadillo, bison, mammoths
Briefly describe the overkill hypothesis and how that may be related to the Quaternary extinction event that affected mainly large mammals.
Humans killed too many large animals at one time which eventually led to their extinction from Earth. This may be related to the extinction because there was a large drop pff in the number of large mammals when humans began to arrive.
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