Dan McKenzie went on to further explain sea floor spreading, being able to explain why new crust was made at mid oceanic ridges. He used his knowledge of thermodynamics to come up with a model of the
Wegeners ideas were proved even further, increasing our knowledge of tectonic events. Sea floor spreading shows that rock is being both created and destroyed. In the 1950s and 1960s, ages of the ocean floor were measured. The surveys suggested that very young rocks, ageing less than 1 million years old, are found near ridges and older rocks, ageing over 200 million years, are found near the continents. Evidence of sea floor spreading can be found in the Atlantic, where it is believed that the North American and Eurasian plates are moving apart at a constructive plate margin.
1. Bacterial resistance to antibiotics 2. Comparative biochemistry 3. The fossil record ANSWER: A) max 7 pts The Big Picture: 1 pt- punctuated equilibrium, mass extinction, etc 1 pt- definition of evolution- change through time 1 pt- mutation- change in gene yields genetic variation 1 pt- natural selection/selective pressure (Darwin) 1 pt- genetic variation exists 1 pt- over production 1 pt- competition – survival of fittest (best genes) 1 pt- survivors reproduce (best
Even though the coastlines didn’t match perfectly (maybe due to erosion/weathering), he later found that the continental shelves matched more closely which matched the theory that those continents were once together. The strongest evidence for continental movement is the study of paleomagnetism. The study of the intensity and orientation of the Earths magnetic field is preserved in the magnetic orientation of certain minerals found in rocks formed throughout geologic time. A study of the ocean floors have demonstrated that the orientation of the earths
Where did we come from? When did we begin? Such questions have plagued our species since we became self aware. The fossil record is extremely sparse, and our ‘family tree’ is being written, and re-written, as discoveries are made. We all know about Charles Darwin and his theory of evolution by natural selection, so eloquently expressed in his “Origin of Species”, published in 1859.
Human Evaluation: As we all know (per Charles Darwin) struggle for existence and natural choice of selection made human to think more with reasoning and analysis ( back bone of reasoning and analysis “WHY”) which intern separated human beings from all other animals. This is completely natural selection. Why mankind is unique among all other creatures? It is completely natural selection but why? 1) Creativity: Per Anthropology and research proves that sophisticated works of art first appeared in the fossil record about 50,000 years ago, at the time that modern’s humans first appeared.
Wenger’s proposition was that the continents were slowly moving along with tectonic plates and that was why they shifted position on the earths surface, the evidence to support his theory was the same plant fossils and similar rock formations all found on different continents. Wenger believed that the continents had once formed to make one whole continent known as Pangea, which is Greek for ‘all the lands’. According to Wenger’s theory Pangea began to break up about 225-200 million years ago and eventually fragmented into the continents we know
The underlying ideas that Wilson built his theory on were proposed by Alfred Wegener in 1912 with his Theory of Continental Drift. Tuzo Wilson was able to provide a way to explain how the continents were able to move apart that Wegener could not explain when he had proposed his idea. Scientists had believed that based on the evidence Wegener had provided it did appear that all of the present day continents had somehow been connected together. The way that the coasts of Africa and South America appear to fit together nicely in addition to fossil evidence of large tortoises and other animals being found near the edges of the continents. Alfred could not explain how the huge masses of land could have moved so far.
Article Review: The Origin of Old-Earth Geology and its Ramifications for Life in the 21st Century Introduction Dr. Terry Mortenson published “The Origin of Old-Earth Geology and its Ramifications for Life in the 21st Century” on August 5, 2003. In this article he described how scientist formed opinions of the age of the earth and how it was formed prior to the 19th century. Furthermore he discussed how geology was debated between believers and non-believers. Overview Popular scientist of the times developed a theory of the earth’s age and formation without acknowledging God existed and therefore was not a part of creation. Scientist developed many of their own personal opinions about creation.
His main evidence was the continents appear to have a jigsaw like fit, the west coast of Africa and South America have the same pattern of rock layers and have the same plant and animal fossils; some of these animals are only found in those parts of the world and their fossils show they could not swim. Although it had been noted that the shapes of the continents seemed to fit together Wenger died in 1930 and his ideas had still not been accepted. This was because there was no explanation for how the continents moved and because he was not a geologist. In the 1950s and years later geologists began to consider the theory of continental drift due to fossil records from separate continents showing the same species and mineral specimens along the same break lines of the continents. His ideas were not fully accepted until the 1960s when the Atlantic Ocean floor was surveyed in detail and the mid Atlantic ridge was discovered.