Ordovician

layered throughout the Ordovician Period and the Devonian Period reacted with each other. This caused the limestone dissolve. The layers that we could've seen while in the cave were the Coeymans, Manlius, Rondout layers. The coeyman layer is harder to erode than the Manlius layers. That means the water eroded the Manlius layers leaving the Coeymans alone. Sometimes, water will seep through the ground, collecting minerals. When the water reached the cave, the water would evaporate leaving just the minerals. These minerals would gather in one place leaving flowstone, stalactites, and stalagmites. During our New York trip we stopped off at a fossil site. The fossils that we picked up there were found in oriskany sandstone. Oriskany Sandstone started to form when the erosion of the mountains caused the land to subside allowing the inland sea to flood the land. When the water rose, it caused a sandy beach with humongous waves to form. The sandy beach created was mineral rich. This oriskany sandstone is actually commonly found inside limestone. You probably can’t find this sandstone in paleozoic corals. The oriskany sandstone is filled with quartzs. This sandstone is known for the natural gas production. When I picked up the Oriskany Sandstone rocks that I needed, I noticed that the rock was fine grained, it wasn’t rough. The Appalachian Basin was the basin created when the TIA, Baltica, and Gondwana collided with North America in the Ordovician Period. When the…

The Tuscarora formation is a light-gray sandstone with quartz grains imbedded throughout it. Most exposed Tuscarora specimens were dark and weathered on the exterior but were light colored on the interior and comprised of fine to coarse grains. The Tuscarora formation is about two hundred meters thick. The Castenea formation is found in parts of the Tuscarora formation. It is typically observed as a dark brown-reddish layer binding a middle section of lighter brown fine grain well sorted…

In four-hundred and sixty million years ago in the Ordovician era the plates are moving again and a new continent is formed called godiwalla. There should be plants and animals now because of the oxygen level, but there is only one reason why there isn’t any life on land yet, the sun. The sun is blasting the earth with deadly radiation, life on earth would not survive at all. With thirty miles from the earth 's surface the oxygen meets the sun 's radiation it forms another gas called the ozone.…

Number 1:The Ordovician Silurian extinction This extinction happened about 439 million years ago because of a drop in sea levels as glaciers formed. An ice age has been blamed for the cause of the extinctions. A large ice sheet in the southern hemisphere caused climate change and a decrease in sea levels. A combination of this lowering of sea level caused a reduction in ecospace on continental shelves, and the cooling caused by the glaciation itself are some of the big factors for the…

List and describe the six different periods into which the Paleozoic Era is divided The first period in the Paleozoic Era was the Cambrian Period. During this period there was a sudden explosion of life on earth. The climate of the Cambrian Period was relatively cold at first, but then started to gradually warm up. Halfway through this period life started to go extinct. The second period in the Paleozoic Era was the Ordovician Period. During this time, life underwater went through some…

The Saint Peter area has a variety if geology structures within it. At the first stop we made, there was Ordovician dolomite, Cambrian sandstone, and Quaternary till. The sandstone was the oldest in the formation of rocks dating back over 550 million years. It was a layered set of sandstone and was folded. The elevation was less than 1,000 feet and its thickness was approximately 115. The next oldest in this area was the Ordovician dolomite. This is roughly 505 million years old. It was bedded…

broken down with no evidence that it ever existed at all. How crazy is that something that is alive for at least ten years, will leave this Earth without leaving a trace behind. I think that that is insane. How is there no memory of a life form? The hard parts like the wheel, bones, and teeth will remain because it has already been layered with minerals which will preserve it. Extinction is based on shallow marine shells. All of the marine wheel look very different, and can be broken up into…

some say that the rapidly changing climate plays a huge role in the disappearance of the species (?). The five great extinctions all occurred during the Phanerozoic eon (handout from class). The first of the five great extinctions, the end Ordovician, happened around 444 million years ago (?). The late Devonian extinction happened around 375 million years ago, while the biggest and by far the worst, the end Permian, occurred 251 million years ago (?). Occurring 200 million years ago was the end…

Five extinctions of Earth and Who will be Next? The Earth we live on now is drastically different from how it was millions of years ago. The Earth has gone through many changes and events though time. There are five major events in history that have changed the world. Without these five mass extinctions who knows what Earth would have looked like, and if humans would even be alive. In the ordovician period 439 million years ago there was a mass extinction that wiped out 89% of life on Earth.…

Scientists have discovered that during life on Earth there has been 5 mass extinctions. These mass extinctions are said to be a normal part  of life and might even be an important factor for life on Earth. The main mass extinctions that have been discovered are the Ordovician Mass Extinction, the Devonian, Permian, Triassic, and the Cretaceous Mass Extinction. Scientists now even believe that we are not only part of the problem but the main subjects of the sixth mass extinction caused by…