https://padlet.com/3044111/lfws7lvsjyz2 en-us 2018-01-23 17:34:04 UTC 2023-03-26 00:46:35 UTC hello@padlet.com 3044111 https://padlet.com/3044111/lfws7lvsjyz2/wish/223903105 a geological doctrine that processes acting in the same manner as at present and over long spans of time are sufficient to account for all current geological features and all past geological changes — compare catastrophism.

]]> 2018-01-23 17:36:03 UTC https://padlet.com/3044111/lfws7lvsjyz2/wish/223903105 3044111 https://padlet.com/3044111/lfws7lvsjyz2/wish/223903951 Geology. a basic law of geochronology, stating that in any undisturbed sequence of rocks deposited in layers, the youngest layer is on top and the oldest on bottom, each layer being younger than the one beneath it and older than the one above it.]]> 2018-01-23 17:37:27 UTC https://padlet.com/3044111/lfws7lvsjyz2/wish/223903951 3044111 https://padlet.com/3044111/lfws7lvsjyz2/wish/223904412 The Principle of Original Horizontality states that layers of sediment are originally deposited horizontally under the action of gravity . It is a relative dating technique. The principle is important to the analysis of folded and tilted strata.]]> 2018-01-23 17:38:01 UTC https://padlet.com/3044111/lfws7lvsjyz2/wish/223904412 3044111 https://padlet.com/3044111/lfws7lvsjyz2/wish/223904699 The principle of lateral continuity states that layers of sediment initially extend laterally in all directions; in other words, they are laterally continuous. As a result, rocks that are otherwise similar, but are now separated by a valley or other erosional feature, can be assumed to be originally continuous.

]]> 2018-01-23 17:38:28 UTC https://padlet.com/3044111/lfws7lvsjyz2/wish/223904699 3044111 https://padlet.com/3044111/lfws7lvsjyz2/wish/223905277 Cross-cutting relationships is a principle of geology that states that the geologic feature which cutsanother is the younger of the two features. It is a relative dating technique in geology.

]]> 2018-01-23 17:39:29 UTC https://padlet.com/3044111/lfws7lvsjyz2/wish/223905277 3044111 https://padlet.com/3044111/lfws7lvsjyz2/wish/223905663 This is a restatement of Charles Lyell's original principle of inclusions and components from his 1830 to 1833 multi-volume Principles of Geology, which states that, with sedimentary rocks, if inclusions (or clasts) are found in a formation, then the inclusions must be older than the formation that contains them.

]]> 2018-01-23 17:40:10 UTC https://padlet.com/3044111/lfws7lvsjyz2/wish/223905663 3044111 https://padlet.com/3044111/lfws7lvsjyz2/wish/223906227 Organisms buried in sediment may decay or dissolve away leaving a cavity or mold. If the space is subsequently filled with sediment, an external castcan be made. Molds and casts are three dimensional and preserve the surface contours of the organism.

]]> 2018-01-23 17:41:02 UTC https://padlet.com/3044111/lfws7lvsjyz2/wish/223906227 3044111 https://padlet.com/3044111/lfws7lvsjyz2/wish/223907152 In geology, petrifaction or petrification is the process by which organic material becomes a fossil through the replacement of the original material and the filling of the original pore spaces with minerals.

]]> 2018-01-23 17:42:33 UTC https://padlet.com/3044111/lfws7lvsjyz2/wish/223907152 3044111 https://padlet.com/3044111/lfws7lvsjyz2/wish/223907666 A fossil trackway is a type of trace fossil, a trackway made by an organism. Many fossil trackways were made by dinosaurs, earlytetrapods, and other quadrupeds and bipeds on land. Marine organisms also made many ancient trackways (such as the trails of trilobites and eurypterids like Hibbertopterus).

]]> 2018-01-23 17:43:30 UTC https://padlet.com/3044111/lfws7lvsjyz2/wish/223907666 3044111 https://padlet.com/3044111/lfws7lvsjyz2/wish/223907807 A coprolite is fossilized feces. Coprolites are classified as trace fossils as opposed to body fossils, as they give evidence for the animal's behaviour (in this case, diet) rather than morphology. The name is derived from the Greek words κόπρος (kopros, meaning "dung") and λίθος (lithos, meaning "stone").]]> 2018-01-23 17:43:44 UTC https://padlet.com/3044111/lfws7lvsjyz2/wish/223907807 3044111 https://padlet.com/3044111/lfws7lvsjyz2/wish/223908262 A true form fossil is a fossil of the whole/entire body of the organism, like an actual animal or animal part. How Are TheyFormed ? True form fossils are formed when the animals soft tissues or hard parts did not decay over the years. Comments.

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