https://padlet.com/304504/bb9fi7y8jgvx en-us 2018-01-30 17:35:05 UTC 2023-02-15 11:09:57 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Hearts.png 304504 https://padlet.com/304504/bb9fi7y8jgvx/wish/226219368 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 .]]> 2018-01-30 17:37:17 UTC https://padlet.com/304504/bb9fi7y8jgvx/wish/226219368 304504 https://padlet.com/304504/bb9fi7y8jgvx/wish/226220594 the principle that in a series of stratified sedimentary rocks the lowest stratum is the oldest.]]> 2018-01-30 17:39:06 UTC https://padlet.com/304504/bb9fi7y8jgvx/wish/226220594 304504 https://padlet.com/304504/bb9fi7y8jgvx/wish/226222061 Organisms buried in sediment may decay or dissolve away leaving a cavity or mold. ]]> 2018-01-30 17:41:15 UTC https://padlet.com/304504/bb9fi7y8jgvx/wish/226222061 304504 https://padlet.com/304504/bb9fi7y8jgvx/wish/226223021 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.]]> 2018-01-30 17:42:41 UTC https://padlet.com/304504/bb9fi7y8jgvx/wish/226223021 304504 https://padlet.com/304504/bb9fi7y8jgvx/wish/226223563 A fossil trackway is a type of trace fossil, a trackway made by an organism. ]]> 2018-01-30 17:43:29 UTC https://padlet.com/304504/bb9fi7y8jgvx/wish/226223563 304504 https://padlet.com/304504/bb9fi7y8jgvx/wish/226224205 A mold is the impression and void (space, hole) that an organism or organism's body or body part leaves in the sediment. ]]> 2018-01-30 17:44:37 UTC https://padlet.com/304504/bb9fi7y8jgvx/wish/226224205 304504 https://padlet.com/304504/bb9fi7y8jgvx/wish/226224984 the younger the rocks get. the smellier the rocks get. the harder the rocks get. the older the rocks get. ]]> 2018-01-30 17:45:54 UTC https://padlet.com/304504/bb9fi7y8jgvx/wish/226224984 304504 https://padlet.com/304504/bb9fi7y8jgvx/wish/226226412 Fossils. Fossils are physical evidence of preexisting organisms, either plant or animal.]]> 2018-01-30 17:48:14 UTC https://padlet.com/304504/bb9fi7y8jgvx/wish/226226412 304504 https://padlet.com/304504/bb9fi7y8jgvx/wish/226227342 Earth is the third planet from the Sun and the only object in the Universe known to harbor life. According to radiometric dating and other sources of evidence, Earth formed over 4 billion years ago.]]> 2018-01-30 17:49:38 UTC https://padlet.com/304504/bb9fi7y8jgvx/wish/226227342 304504 https://padlet.com/304504/bb9fi7y8jgvx/wish/226228280  An incredible array of amazing fossils have been discovered frozen in time.]]> 2018-01-30 17:51:11 UTC https://padlet.com/304504/bb9fi7y8jgvx/wish/226228280 304504 https://padlet.com/304504/bb9fi7y8jgvx/wish/226229293 Most of the rocks exposed at the surface of Earth are sedimentary--formed from particles of older rocksthat have been broken apart by water or wind. ]]> 2018-01-30 17:52:54 UTC https://padlet.com/304504/bb9fi7y8jgvx/wish/226229293 304504 https://padlet.com/304504/bb9fi7y8jgvx/wish/226230170  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.]]> 2018-01-30 17:54:20 UTC https://padlet.com/304504/bb9fi7y8jgvx/wish/226230170 304504 https://padlet.com/304504/bb9fi7y8jgvx/wish/226230721 The Eras are the next largest interval units into which the Geologic Time is divided and represented on the chart. Eras encompass major intervals of Time and are defined based on the fossil life-forms found in the rock layers, and the Law of Superposition. ... The Paleozoic Era, the Mesozoic Era, and the Cenozoic Era.]]> 2018-01-30 17:55:10 UTC https://padlet.com/304504/bb9fi7y8jgvx/wish/226230721 304504 https://padlet.com/304504/bb9fi7y8jgvx/wish/226231906 The Cenozoic is sometimes called the Age of Mammals, because the largest land animals have been mammals during that time. ]]> 2018-01-30 17:56:38 UTC https://padlet.com/304504/bb9fi7y8jgvx/wish/226231906 304504 https://padlet.com/304504/bb9fi7y8jgvx/wish/226232556 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.]]> 2018-01-30 17:57:35 UTC https://padlet.com/304504/bb9fi7y8jgvx/wish/226232556 304504 https://padlet.com/304504/bb9fi7y8jgvx/wish/226233495 a fossil of a footprint, trail, burrow, or other trace of an animal rather than of the animal itself.]]> 2018-01-30 17:58:56 UTC https://padlet.com/304504/bb9fi7y8jgvx/wish/226233495 304504 https://padlet.com/304504/bb9fi7y8jgvx/wish/226234010 A metamorphic rock is a type of rock which has been changed by extreme heat and pressure. ]]> 2018-01-30 17:59:39 UTC https://padlet.com/304504/bb9fi7y8jgvx/wish/226234010 304504 https://padlet.com/304504/bb9fi7y8jgvx/wish/226234520 Rock that has formed through the deposition and solidification of sediment, especially sediment transported by water (rivers, lakes, and oceans), ice ( glaciers ), and wind.]]> 2018-01-30 18:00:27 UTC https://padlet.com/304504/bb9fi7y8jgvx/wish/226234520 304504 https://padlet.com/304504/bb9fi7y8jgvx/wish/226235267 Igneous rock (derived from the Latin word ignis meaning fire), or magmatic rock, is one of the three main rock types, the others being sedimentary and metamorphic. ]]> 2018-01-30 18:01:41 UTC https://padlet.com/304504/bb9fi7y8jgvx/wish/226235267 304504 https://padlet.com/304504/bb9fi7y8jgvx/wish/226237023 2018-01-30 18:04:24 UTC https://padlet.com/304504/bb9fi7y8jgvx/wish/226237023