Sedimentary Principals and Fossils by Jorge Martinez https://padlet.com/304758/pdlx8ttis3q4 en-us 2018-01-23 19:37:27 UTC 2018-01-23 21:40:40 UTC hello@padlet.com Principle of uniformitarianism 304758 https://padlet.com/304758/pdlx8ttis3q4/wish/223980091 Uniformitarianism is defined in the authoritative Glossary of Geology as "the fundamental principle or doctrine that geologic processes and natural laws now operating to modify the Earth's crust have acted in the same regular manner and with essentially the same intensity throughout geologic time, and that past]]> 2018-01-23 19:40:09 UTC https://padlet.com/304758/pdlx8ttis3q4/wish/223980091 Principle of superposition 304758 https://padlet.com/304758/pdlx8ttis3q4/wish/223981494
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law of superposition. 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 19:42:49 UTC https://padlet.com/304758/pdlx8ttis3q4/wish/223981494 Principle of original horizontality 304758 https://padlet.com/304758/pdlx8ttis3q4/wish/223982631 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 19:44:59 UTC https://padlet.com/304758/pdlx8ttis3q4/wish/223982631 Principle of original lateral continuity 304758 https://padlet.com/304758/pdlx8ttis3q4/wish/223984340 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 19:48:09 UTC https://padlet.com/304758/pdlx8ttis3q4/wish/223984340 principle of cross-cutting relationships 304758 https://padlet.com/304758/pdlx8ttis3q4/wish/223985023 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 19:49:22 UTC https://padlet.com/304758/pdlx8ttis3q4/wish/223985023 Principle of inclusions 304758 https://padlet.com/304758/pdlx8ttis3q4/wish/223985782 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 19:50:51 UTC https://padlet.com/304758/pdlx8ttis3q4/wish/223985782 Mold and Cast fossils 304758 https://padlet.com/304758/pdlx8ttis3q4/wish/223992854 mold-fossil. Noun. (plural mold fossils) A fossilformed when an animal, plant, or other organism dies and is covered by sediment, its flesh decays and bones deteriorate due to chemical reactions, and a cavity remains below the ground surface.]]> 2018-01-23 20:05:27 UTC https://padlet.com/304758/pdlx8ttis3q4/wish/223992854 Petrification Fossils 304758 https://padlet.com/304758/pdlx8ttis3q4/wish/223993602 Petrified wood is the name given to a special type of fossilized remains of terrestrial vegetation. It is the result of a tree or tree-like plants having completely transitioned to stone by the process of permineralization.]]> 2018-01-23 20:06:38 UTC https://padlet.com/304758/pdlx8ttis3q4/wish/223993602 Footprints and Trackways Fossils 304758 https://padlet.com/304758/pdlx8ttis3q4/wish/223995089 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 20:09:49 UTC https://padlet.com/304758/pdlx8ttis3q4/wish/223995089 Coprolites Fossils 304758 https://padlet.com/304758/pdlx8ttis3q4/wish/223995555 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 20:10:49 UTC https://padlet.com/304758/pdlx8ttis3q4/wish/223995555 Whole Body or True Form Fossils 304758 https://padlet.com/304758/pdlx8ttis3q4/wish/223996051 A true form fossil is a fossil of the whole/entire body of the organism, like an actual animal or animal part. True form fossilsare formed when the animals soft tissues or hard parts did not decay over the years.]]> 2018-01-23 20:11:49 UTC https://padlet.com/304758/pdlx8ttis3q4/wish/223996051