Sedimentary Principals and Fossils by Maira Sereno https://padlet.com/304828/7qtr9l3899ei Made with mirth en-us 2018-01-23 20:10:52 UTC 2023-03-14 10:28:41 UTC hello@padlet.com Principle of uniformitarianism 304828 https://padlet.com/304828/7qtr9l3899ei/wish/223996593 Uniformitarianism is defined in the authoritative Glossary of Geology as "the fundamental principle or doctrine that geologic processes and natural laws now operating.]]> 2018-01-23 20:12:50 UTC https://padlet.com/304828/7qtr9l3899ei/wish/223996593 Principle of superposition 304828 https://padlet.com/304828/7qtr9l3899ei/wish/223999226  the principle that in a series of stratified sedimentary rocks the lowest stratum is the oldest. 2. n. ]]> 2018-01-23 20:17:50 UTC https://padlet.com/304828/7qtr9l3899ei/wish/223999226 Principle of original horizontality 304828 https://padlet.com/304828/7qtr9l3899ei/wish/224000751 The Principle of Original Horizontality states that layers of sediment are originally deposited horizontally under the action of gravity. ]]> 2018-01-23 20:21:18 UTC https://padlet.com/304828/7qtr9l3899ei/wish/224000751 Principle of original lateral continuity 304828 https://padlet.com/304828/7qtr9l3899ei/wish/224001774 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 20:23:26 UTC https://padlet.com/304828/7qtr9l3899ei/wish/224001774 principle of cross-cutting relationships 304828 https://padlet.com/304828/7qtr9l3899ei/wish/224002442 The principle of cross-cutting relationships states that an igneous intrusion is always younger than the rock it cuts across.]]> 2018-01-23 20:24:58 UTC https://padlet.com/304828/7qtr9l3899ei/wish/224002442 Principle of inclusions 304828 https://padlet.com/304828/7qtr9l3899ei/wish/224003002 This is a restatement of Charles Lyell's original principle of inclusions and components from his 1830 to 1833 multi-volume Principles of Geology]]> 2018-01-23 20:26:06 UTC https://padlet.com/304828/7qtr9l3899ei/wish/224003002 Mold and Cast fossils 304828 https://padlet.com/304828/7qtr9l3899ei/wish/224003422 Organisms buried in sediment may decay or dissolve away leaving a cavity or mold. If the space is subsequently filled with sediment, an external cast can be made]]> 2018-01-23 20:27:08 UTC https://padlet.com/304828/7qtr9l3899ei/wish/224003422 Petrification Fossils 304828 https://padlet.com/304828/7qtr9l3899ei/wish/224004117 In geology, petrifaction or petrification is the process by which organic material becomes a fossil through the replacement of the original material]]> 2018-01-23 20:28:48 UTC https://padlet.com/304828/7qtr9l3899ei/wish/224004117 Footprints and Trackways Fossils 304828 https://padlet.com/304828/7qtr9l3899ei/wish/224004797 A fossil trackway is a type of trace fossil, a trackway made by an organism. ... Marine organisms also made many ancient trackways ]]> 2018-01-23 20:30:35 UTC https://padlet.com/304828/7qtr9l3899ei/wish/224004797 Coprolites Fossils 304828 https://padlet.com/304828/7qtr9l3899ei/wish/224005617 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]]> 2018-01-23 20:32:27 UTC https://padlet.com/304828/7qtr9l3899ei/wish/224005617 Whole Body or True Form Fossils 304828 https://padlet.com/304828/7qtr9l3899ei/wish/224006458 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.]]> 2018-01-23 20:34:12 UTC https://padlet.com/304828/7qtr9l3899ei/wish/224006458