Triassic

terrestrial species were lost (“Permian Extinction”, 2015) (Murcia, 2015). During this extinction event, there were many organisms that disappeared but did not go extinct. They merely disappeared, but the reappeared again during the middle to late Triassic period (Erwin, 1990). There were also organisms that slowly started disappearing at the beginning of the Permian: the corals and other organisms like the corals (Erwin, 1990). Different groups during this time started declining at different…

referred to as the Permian-Triassic extinction, in Earth’s history shifting Earth into a new era: The Mesozoic Era. Frequently mentioned to as “Age of Reptiles” due to the amount of reptiles that predominated the lands, however they were not alone; land-dwelling vertebrate animals and vast amount of plants, insects and fish also existed among them. By the time span of 180 million years the Mesozoic Era has been divided into three major divisions, from oldest to youngest, Triassic Period, the…

development of a long sequence of rift basins. The Deerfield basin is the erosional remnant of one of these rifts exposed in North America after Pangaea separated during the Carnian (Olsen et al., 1992). Today, the valley formations include Pre-Triassic basement, Late-Triassic Sugarloaf Arkose, Early-Jurassic Fall River Beds, Jurassic Deerfield Basalt, Jurassic Turner Falls Sandstone, and Jurassic Mt. Toby Conglomerate. Observations Stop 1, located on Rt. 2 West at the Longview Gift Shop, the…

The first mammals evolved from mammal-like reptiles at the end of the triassic period. Therapsids, or mammal-like reptiles, is an order of reptiles that lived in the Permian and Triassic Periods before going extinct in the mid Jurassic Period. It is difficult for scientist to determine when the divide between therapsids and mammals occurred. Early mammals had small, mouselike forms. Very few were large, because dinosaurs were the unquestioned dominant land animals on earth. The ecological niche…

Era: The dinosaurs went extinct 65 million years ago. The Mesozoic Era lasted about 180 million years, and is divided into three periods, the Triassic, the Jurassic, and the Cretaceous. Each of these periods is divided into many epochs and ages. Earth during the Mesozoic Era was much warmer than today, and the planet had no polar ice caps. During the Triassic Period, Pangaea still formed one massive supercontinent. Without much coastline to moderate the continent's interior temperature, Pangaea…

The Permian Mass Extinction Introduction There are five major extinctions in history: the Late Devonian, the Ordovician-Silurian, the Permian-Triassic, the Triassic-Jurassic, and the Cretaceous-Tertiary. Known as the Big Five, these extinctions exceeded all others in size and destruction, each killing more than 60% of species from that period. Each one acted as a bottleneck, allowing the survival of only a fraction of the organisms that had been thriving before, from which evolution and life…

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…

Summary: Three asteroids have the potential to hit Earth in the next millennia. The first two possibilities are asteroids entitled 2009 FD and RQ36, and could hit Earth in between 2175 and 2199. The asteroid 2009 FD has a one in three-hundred and sixty-five chance of hitting, which doesn’t sound like a big deal, but it it does hit, our descendants will be in trouble. RQ36 has the likliness of hitting Earth by a one in one-thousand and seven-hundred chance, but even though it seems an unlikely…

that were existentin thosecertain eras and the environmental changes which also occurred during these eras. Dinosaurs dominated and reigned supreme on this our home called earth from the late part of the first sub-era of the Mesozoic era called the Triassic sub-era (230-201 million years ago) to the last sub-era called Cretaceous sub-era (145-66 million years). The three sub-era of the Mesozoic era…

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.…