https://padlet.com/304963/pd8bfyh7x3iz en-us 2018-01-23 18:23:21 UTC 2024-11-21 10:16:31 UTC hello@padlet.com 304963 https://padlet.com/304963/pd8bfyh7x3iz/wish/223933454 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]]> 2018-01-23 18:25:04 UTC https://padlet.com/304963/pd8bfyh7x3iz/wish/223933454 304963 https://padlet.com/304963/pd8bfyh7x3iz/wish/223935030 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.]]> 2018-01-23 18:27:33 UTC https://padlet.com/304963/pd8bfyh7x3iz/wish/223935030 304963 https://padlet.com/304963/pd8bfyh7x3iz/wish/223935994 states that layers of sediment are originally deposited horizontally under the action of gravity . It is a relative dating technique.]]> 2018-01-23 18:29:19 UTC https://padlet.com/304963/pd8bfyh7x3iz/wish/223935994 304963 https://padlet.com/304963/pd8bfyh7x3iz/wish/223936324 The principle of lateral continuity states that layers of sediment initially extend laterally in all directions; in other words, they are laterally continuous]]> 2018-01-23 18:29:53 UTC https://padlet.com/304963/pd8bfyh7x3iz/wish/223936324 304963 https://padlet.com/304963/pd8bfyh7x3iz/wish/223937632 Cross-cutting relationships is a principle of geology that states that the geologic feature which cutsanother is the younger of the two features.]]> 2018-01-23 18:31:26 UTC https://padlet.com/304963/pd8bfyh7x3iz/wish/223937632 304963 https://padlet.com/304963/pd8bfyh7x3iz/wish/223938612 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 18:33:06 UTC https://padlet.com/304963/pd8bfyh7x3iz/wish/223938612 304963 https://padlet.com/304963/pd8bfyh7x3iz/wish/223939775 Organisms buried in sediment may decay or dissolve away leaving a cavity or mold. If the space is subsequently filled with sediment, an external cost can be made. Molds and casts are three dimensional and preserve the surface contours of the organism.]]> 2018-01-23 18:35:08 UTC https://padlet.com/304963/pd8bfyh7x3iz/wish/223939775 304963 https://padlet.com/304963/pd8bfyh7x3iz/wish/223941040 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 18:37:03 UTC https://padlet.com/304963/pd8bfyh7x3iz/wish/223941040 304963 https://padlet.com/304963/pd8bfyh7x3iz/wish/223941848 A fossil trackway is a type of trace fossil, a trackway made by an organism.]]> 2018-01-23 18:38:25 UTC https://padlet.com/304963/pd8bfyh7x3iz/wish/223941848 304963 https://padlet.com/304963/pd8bfyh7x3iz/wish/223943601 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 18:41:18 UTC https://padlet.com/304963/pd8bfyh7x3iz/wish/223943601 304963 https://padlet.com/304963/pd8bfyh7x3iz/wish/223944349 True form fossils are when the actual plant or animal IS the fossil; that is, the whole organism has been preserved. ]]> 2018-01-23 18:42:41 UTC https://padlet.com/304963/pd8bfyh7x3iz/wish/223944349