Cambrian

Precambrian time covers the tremendous greater part of the Earth's history, beginning with the planet's creation around 4.5 billion years prior and finishing with the development of complex, multi celled life-shapes very nearly four billion years after the fact. The Precambrian is the most punctual of the geologic ages, which are set apart by various layers of sedimentary rock. Set down over a huge number of years, these stone layers contain a lasting record of the Earth's past, including the…

The Badlands is in the Southeastern corner of South Dakota, located to the East of the Black Hills. It was declared a national monument in 1929, and then was declared a national park though an act of congress in 1978. (Stoffer 2) The park is most known for its rugged, desolate appearance, with jagged rocks and interesting formations. The core of the “badlands” (meaning the “badlands” associated with Badlands National Park) is part of a dissected plateau region bounded by the Cheyenne River (to…

most diverse phylum in the animal kingdom. Chordates are cosmopolitan and are well represented in marine, freshwater as well as terrestrial habitats from the equator to the high northern and southern latitudes. The oldest fossil chordates are of Cambrian age. All chordates are deuterosomes, and their organs are suspended in the mesentery tissue between the endoderm tissue of the digestive tract (alimentary canal) and the ectoderm tissue on the surface. There are about 45,000 species of chordates…

Ecologist Peter Mayhew of the University of York in England had said that three big greenhouse phases happened in this time, where the peaks in temperatures uncoincidentally coincided with the mass extinctions following the Permian, Triassic, and mid- Cambrian periods, resulting in symptoms such as a rapid jump in global temperatures, rising sea levels, and ocean acidification, all of which are happening today with human-caused climate change. When pairing the data, shows that eras with pretty…

Dendrochronology supports old earth. Probably the greatest piece of old earth evidence is the Cambrian explosion. The Progressive theory is based on a lot of individual creations by God over a span of time. Fossil records have shown small physical changes in a species body. This shows that we could have come from even the smallest of life forms. If…

When Charles Darwin exposed his theory of evolution for the first time, criticism soon aroused. The period 's mindset highly motivated the struggles for acceptance of Darwin 's theory. In other words, by the 1800s, the notion of an old Earth filled with evolving species dating back from billions of years contradicted religious beliefs and was far beyond everything concluded by other scholars. Although his book soon attracted the attention and support of many scientists to his new “Darwinistic”…

CHAPTER THREE 3. Materials and methods 3.1 Description of the study area 3.1.1 Location Dire Dawa is one of the two chartered cities in Ethiopia (the other being the capital, Addis Ababa). The administrative council consists of the city of Dire Dawa and the surrounding rural areas. The council has no administrative zones but one woreda - Gurgura woreda. There are 4 Keftegnas, 24 urban kebeles and 28 rural peasants associations. It is found at a road distance of 515 km from Addis Ababa. Dire Dawa…

The snowball Earth Theory was hypothesized by British geologist Brian Harland in 1964. The core ideal of the theory is that during the Pre-Cambrian period, the continents of the Earth were located near the Southern Hemisphere, and the entire planet was covered in glacial ice sheets, from the Poles to the equator (Schrag, et al., 2002). The following essay will aim to explain the theory of the Snowball Earth in detail. Brian Harland based his theory on the fact that he found glacial tillites with…

Brachiopods within the fossil record have many uses to help inform us about past seawater evolution. As they were one of the earliest animals after the Cambrian explosion to develop a hard skeleton, they have a strong presence in the fossil record throughout geologic time and are the subject of one of the preferred methods used for deep time isotopes. As the calcite within the hard shell of a brachiopod precipitates out of the surrounding seawater, trace elements are recorded within the shell,…

New York exists on bedrock that tells a tale of millions of years ago, going as far back as the late Mesoproterozoic (1.6 to 1 billion years ago). The layers that make up this bedrock show the conditions of the earth’s surface through many different orogenies, which are times of high grade metamorphism and where plate tectonics makes its biggest changes. The Fordham gneiss was formed a billion years ago (oldest) during the Grenville orogeny (Precambrian) which featured sediment deposits and…