https://padlet.com/304541/caaissnna224 Made with an open mind en-us 2018-01-23 21:42:39 UTC 2023-04-04 19:11:01 UTC hello@padlet.com 304541 https://padlet.com/304541/caaissnna224/wish/224028901 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 21:44:27 UTC https://padlet.com/304541/caaissnna224/wish/224028901 304541 https://padlet.com/304541/caaissnna224/wish/224029190 (geology) the principle that in a series of stratified sedimentary rocks the lowest stratum is the oldest. 2. n. the displacement of any point due to the superposition of wave systems is equal to the sum of the displacements of the individual waves at that point. Full Definitions of principle of superposition.]]> 2018-01-23 21:45:32 UTC https://padlet.com/304541/caaissnna224/wish/224029190 304541 https://padlet.com/304541/caaissnna224/wish/224029250 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 21:45:48 UTC https://padlet.com/304541/caaissnna224/wish/224029250 304541 https://padlet.com/304541/caaissnna224/wish/224029301 Cross-cutting relationships is a principle of geologythat 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 21:46:04 UTC https://padlet.com/304541/caaissnna224/wish/224029301 304541 https://padlet.com/304541/caaissnna224/wish/224029371 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 21:46:22 UTC https://padlet.com/304541/caaissnna224/wish/224029371 304541 https://padlet.com/304541/caaissnna224/wish/224029416 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 21:46:33 UTC https://padlet.com/304541/caaissnna224/wish/224029416 304541 https://padlet.com/304541/caaissnna224/wish/224029458 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 21:46:47 UTC https://padlet.com/304541/caaissnna224/wish/224029458 304541 https://padlet.com/304541/caaissnna224/wish/224029503 Trace fossils may consist of impressions made on the substrate by an organism: for example, burrows, borings (bioerosion), urolites (erosion caused by evacuation of liquid wastes), footprints and feeding marks, and root cavities.]]> 2018-01-23 21:47:01 UTC https://padlet.com/304541/caaissnna224/wish/224029503 304541 https://padlet.com/304541/caaissnna224/wish/224029542 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 21:47:16 UTC https://padlet.com/304541/caaissnna224/wish/224029542 304541 https://padlet.com/304541/caaissnna224/wish/224029758 True form fossils are when the actual plant or animal IS the fossil; that is, the whole organism has been preserved. The soft tissues of the organism never decay. ... This evidence gives scientists the BEST observation of past plants and animals.]]> 2018-01-23 21:48:11 UTC https://padlet.com/304541/caaissnna224/wish/224029758