Exercise 2 relative and absolute dating of geologic events

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Some of the information is technical and I have tried to provide references and links for the more difficult portions of the text in order to help any reader go beyond the material presented here.

There is no shortage of criticism of the radiometric dating technique by young Earth creationists.

Also shown below (click for a larger version) is a photo of the paleosol taken from the other side of the road. 100 dpi photo of the same outcrop taken from the opposite side of the road showing from bottom to top (regolith of Butler Hill Granite, dark paleosol formed on top of the granite, shaly Lamotte Formation (basal), Lamotte sandstone (top). Science has determined the age of the Earth to be 4.54 /- 0.05 Ga As mentioned in the opening of this article, there are at least three pieces of independent evidence that argue strongly against a young earth stance.

I will deal with each of these issues in this essay and answer some of the ye-criticisms.

Just as Sherlock Holmes used his power of observation to decipher the clues to a suspect's past actions, we will let the blemishes and behaviors of the rocks tell us their past story. ) Remember that relative dating involves determining "which came first" rather than "exactly when did this happen." The first step to untangling the geologic history of an area is often to figure out what happened first, second and third, etc.

For example, if most of the radioactive decay implied by fission tracks or quantities of daughter products occurred over the year of the Flood, the amount of heat generated would have been excessive, given present conditions.The weathered granite is overlain by a shaly regolith and the Lamotte sandstone overlaps this irregular surface. form such a formidable obstacle to the idea of a 6000 year old earth and a global flood that most creationists either ignore these topics, or offer outlandish peripheral refutations of the ideas (more on these in a a later paragraph).This photo is updated as the old photo was improperly formatted (the update was made solely to provide proper perspective and to highlight the absurdity of Tas Walker's 'analysis' rather than to Walker's blustering about 'changing the story'). What is it about these topics that send ye-creationists running for the cover?This section presents many basic concepts that are universal to all physical sciences.1. A mineral is a naturally occurring, inorganic (never living) solid with a definite internal arrangement of atoms (crystal structure) and a chemical formula that only varies over a limited range that does not alter the crystal structure.What are "rocks" and "minerals" - explain the differences. Describe essential concepts of chemistry related to earth materials. What is the chemical and mineral composition of the Earth's crust? List some common silicate and nonsilicate minerals. Describe and illustrate the "rock cycle" as it relates to processes and products. Describe basic geologic principles for interpreting landscape forming processes. On Earth, more than 4,000 minerals have been identified, however, of those fewer than 2 dozen are common minerals in Earth's physical environment (Figure 1-1 shows common rock-forming minerals).Cliffs, road cuts, and non-vegetated landscapes allow us glimpses into geology which is often hidden from view.

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