Types Of Rocks With Fossils
Animal remains are nigh likely to be fossilized if their hard parts are covered by layers of sediments soon after death. With fourth dimension and pressure, these sediments, such as sand, plant debris, or ash, become compressed into rock. Therefore, fossils are found in sedimentary stone, similar sandstone, shale, limestone and coal.
Igneous rock, similar granite and basalt, is formed past molten rock erupting from deep within the earth. Metamorphic rock, such equally marble, is formed by tremendous heat and pressure. Fossils are not normally found in either igneous or metamorphic rocks.
Let's look at a hypothetical fossil locality to come across this process in activeness.
100 million years ago
Scallops and other invertebrates inhabit the sea in this area. When they die, they are covered by sand that settles on them.
75 million years ago
Pressure level compacts the loose sandy sediments into hard sandstone. Dinosaurs now live, and die, in the locality. Like the scallops before them, their bodies are covered by sand.
fifty million years ago
In that location is a tremendous volcanic eruption in the area. The ash thickly covers the land, and for a while the land cannot back up much life.
20 meg years ago
A Parahippus, a 3-toed horse common at the time, dies at the locality. Like the other creatures before it, its body is cached in sand and sediments by moving ridge action.
3 million years ago
The massive forcefulness of an earthquake causes layers of sediments to tilt and push upwardly.
Today
Forces of erosion, such as water moving against rock for millions of years, gradually wears abroad the state surface and a few of the stone layers below it. The fossilized bones of the horse, hidden for millions of years, are exposed above the ground.
Previous ← Amazing Feets Adjacent → Time Scales
Types Of Rocks With Fossils,
Source: https://www.floridamuseum.ufl.edu/fossil-horses/stratigraphy/
Posted by: goodnightmeaust.blogspot.com
0 Response to "Types Of Rocks With Fossils"
Post a Comment