https://padlet.com/34004/aqx03a93nldw en-us 2018-01-23 21:41:43 UTC 2018-01-23 21:59:37 UTC hello@padlet.com 34004 https://padlet.com/34004/aqx03a93nldw/wish/224028527 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]]> 2018-01-23 21:42:43 UTC https://padlet.com/34004/aqx03a93nldw/wish/224028527 34004 https://padlet.com/34004/aqx03a93nldw/wish/224029069  Principle of superposition states that if a rock strata has not been disturbed the lowest stratum was formed before the strata above it. Relative age is determined by comparison to other fossils by referring to geologic timescale.]]> 2018-01-23 21:45:04 UTC https://padlet.com/34004/aqx03a93nldw/wish/224029069 34004 https://padlet.com/34004/aqx03a93nldw/wish/224029593 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 21:47:26 UTC https://padlet.com/34004/aqx03a93nldw/wish/224029593 34004 https://padlet.com/34004/aqx03a93nldw/wish/224029780 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 21:48:17 UTC https://padlet.com/34004/aqx03a93nldw/wish/224029780 34004 https://padlet.com/34004/aqx03a93nldw/wish/224030008 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 21:49:16 UTC https://padlet.com/34004/aqx03a93nldw/wish/224030008 34004 https://padlet.com/34004/aqx03a93nldw/wish/224030218 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 21:50:00 UTC https://padlet.com/34004/aqx03a93nldw/wish/224030218 34004 https://padlet.com/34004/aqx03a93nldw/wish/224030523 The creation of a cast or mold is a common form of indirect preservation. Most fossils do not contain actual body parts but are impressions, molds or casts of the original organism. Essentially, a mold fossil forms when the organic matter of the organism decomposes and leaves a cavity, or mold.]]> 2018-01-23 21:51:20 UTC https://padlet.com/34004/aqx03a93nldw/wish/224030523 34004 https://padlet.com/34004/aqx03a93nldw/wish/224030840 A petrified fossil is different from other fossils such as resin fossils or permineralized fossils because the original material of the organism is still intact in resin fossils or permineralized fossils. Permineralization is often confused with petrification because it is the first step in the petrification process.]]> 2018-01-23 21:52:32 UTC https://padlet.com/34004/aqx03a93nldw/wish/224030840 34004 https://padlet.com/34004/aqx03a93nldw/wish/224031788 A fossil trackway is a type of trace fossil, a trackway made by an organism. Many fossil trackways were made by dinosaurs, early tetrapods, and other quadrupeds and bipeds on land. Marine organisms also made many ancient trackways]]> 2018-01-23 21:56:28 UTC https://padlet.com/34004/aqx03a93nldw/wish/224031788 34004 https://padlet.com/34004/aqx03a93nldw/wish/224032115 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. ]]> 2018-01-23 21:57:37 UTC https://padlet.com/34004/aqx03a93nldw/wish/224032115 34004 https://padlet.com/34004/aqx03a93nldw/wish/224032282 A true form fossil is a fossil of the whole/entire body of the organism, like an actual animal or animal part. True form fossils are formed when the animals soft tissues or hard parts did not decay over the years.]]> 2018-01-23 21:58:23 UTC https://padlet.com/34004/aqx03a93nldw/wish/224032282