Precambrian

Precambrian Era: 4,560,000,000 B.C. - 542,000,000 B.C. Major Geological Event: The Earth was formed by gravity pulling debris into a swirling mass of rock, radioactive decay and rock impacts generated large amounts of heat melting the planets together. Gravity allowed it to gain the spherical shape it has. Materials in higher density formed the core (Iron, Nickel) while materials in lower density became the mantle and crust. Tectonic plates moving around so much made Volcanoes and the gasses released

Water supply and sanitation is a problem in developing nations as they lack the proper resources to install a water collection foundation. Bolivia can be considered a developing nation that has a water supply problem as they do not necessarily have the proper infrastructure to supply their population and they also lack a water regulation program. The village of Lupalaya is a small settlement located at approximately -16.195 degrees latitude, -68.841 degrees longitude with an estimated elevation of

Evolution In Naturalistic Evolutionary view point, Earth was formed out of nothing 4.6 billion years ago, and went through several different periods of intense transition to arrive at what we now see. The first period of transition is known as the Precambrian in which “the most important events

The rapid diversification of most major living phyla in the fossil record known as ‘The Cambrian Explosion’ presents a challenge – even to those with limited understanding of evolution. With the acknowledgement of this ‘explosion’ comes the issue of how it occurred. The problem arises because this sudden burst of change is inconsistent with the typical thought of evolution resulting from gradual change over time – otherwise known as uniformitarian theory (Erwin, 2011). This inconsistency begs the

Geological and Dispositional History of the Starved Rocks, Illinois Describe the clastic and carbonate facies you have discovered. Starved Rock State covers about 200 miles and some 470 million years, from Ordovician sandstones to Pleistocene glacial till. The Ordovician St. Peter Formation sandstone was deposited across the midcontinent during the second major marine transgression of the Paleozoic Era. The first transgression deposited Upper Cambrian to Lower Ordovician clastics and carbonates

Bio Lab 101 Smithsonian Laboratory Early Atmosphere 1. How abundant was oxygen in the early atmosphere? The earth’s early atmosphere contained only small amounts of free oxygen, produced by the reaction of water vapor with sunlight. The oxygen rich atmosphere that developed later and on which oxygen breathing life now depends was result of the origin and spread of organisms capable of photosynthesis. 2. What evidence do scientists have that the oxygen content of our atmosphere has increased

explanation. In this theory, it is said that earth's history has been broken up into four main eras. The Precambrian, Paleozoic, Mesozoic, and Cenozoic Eras. Each of these eras have there own accomplishments, or milestone events, that occurred within the time period. From one-celled organisms to dinosaurs, it all eventually leads up to the first sightings of humans. The first era to occur was the Precambrian Era. One of the first events to happen in the history of the earth is the Hadean Eon. The Hadean

We went on a weekend trip to Fredericktown, Missouri and stopped at different locations in the area trying to understand the different igneous features we were seeing. The area is packed with igneous exposures from columnar basalts, Precambrian basement rock, granitic ring complexes, volcanic ejecta, to mantle xenoliths. Together, these features provide insight into the overall geology of the region, indicating that this terrain was once an active nested caldera complex (multitude of

1.5 Review of Literatures According to (EIGS, 2010); the geology of Ethiopia is characterized by different rock types ranging in age from Precambrian to recent. These rocks are classified into three major geological formations: - Precambrian rocks, Paleozoic – Mesozoic sedimentary rocks and Cenozoic volcanic rocks and associated sediments. (Ebinger et al., 1993); Volcanic activity in the southern MER started earlier than in the other MER sectors, since the oldest rocks were dated at about 45 Ma

The Northeast as a Bioregion Deep History Report-Week 4 Keith McNeal SFS 5020 01 Bioregional Theory and the Foodshed Lisa Trocchia-Balkits Due Date December, 2016 The Northeast as a Bioregion Currently residing in the state of Vermont the bioregion to which I’ve been informally assigned to is commonly known as the Laurentia bioregion. This assignment of bioregion is widely accepted, but when looked at more deeply assigning Vermont to the Laurentia bioregion becomes problematic. There are seemingly