https://padlet.com/304807/ohfzh6wt9wod en-us 2018-01-26 17:04:40 UTC 2018-01-26 17:08:17 UTC hello@padlet.com 304807 https://padlet.com/304807/ohfzh6wt9wod/wish/225143315 In geology and related fields, a stratum is a layer of sedimentary rock or soil, or igneous rock that were formed at the earth's surface, with internally consistent characteristics that distinguish it from other layers]]> 2018-01-26 17:05:55 UTC https://padlet.com/304807/ohfzh6wt9wod/wish/225143315 304807 https://padlet.com/304807/ohfzh6wt9wod/wish/225143428 Metamorphic rocks arise from the transformation of existing rock types, in a process called metamorphism, which means "change in form". The original rock is subjected to heat and pressure, causing profound physical or chemical change]]> 2018-01-26 17:06:15 UTC https://padlet.com/304807/ohfzh6wt9wod/wish/225143428 304807 https://padlet.com/304807/ohfzh6wt9wod/wish/225143638 Rock that has formed through the deposition and solidification of sediment, especially sediment transported by water (rivers, lakes, and oceans), ice ( glaciers ), and wind. Sedimentary rocks are often deposited in layers, and frequently contain fossils. Note : Limestone and shale are common sedimentary rocks]]> 2018-01-26 17:06:46 UTC https://padlet.com/304807/ohfzh6wt9wod/wish/225143638 304807 https://padlet.com/304807/ohfzh6wt9wod/wish/225143863 Extrusive igneous rocks cool and solidify quicker than intrusive igneous rocks. They are formed by the cooling of molten magma on the earth's surface. The magma, which is brought to the surface through fissures or volcanic eruptions, solidifies at a faster rate]]> 2018-01-26 17:07:19 UTC https://padlet.com/304807/ohfzh6wt9wod/wish/225143863 304807 https://padlet.com/304807/ohfzh6wt9wod/wish/225144229 an idealized cycle of processes undergone by rocks in the earth's crust, involving igneous intrusion, uplift, erosion, transportation, deposition as sedimentary rock, metamorphism, remelting, and further igneous intrusion]]> 2018-01-26 17:08:02 UTC https://padlet.com/304807/ohfzh6wt9wod/wish/225144229