explain why are there no fossils in the basalt rock layer
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- Granite and basalt are both igneous rocks-they are formed from magma extruded into another rock layer or from expulsion from a volcano.The heat of the cooling rock would completely melt any fossils they came into contact with and destroy them, so you don't see fossils in these rocks.asalt is the foundation of oceanic crust. Granite is an intrusive igneous rock made from visible mineral crystals, a result of cooling over a longer period of time under the surface of the Earth. Another difference between basalt and granite include their joints.
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Explain why you would find the oldest fossils at the bottom oh a cliff and the youngest fossils at the top of a cliff? Because the ones at the bottom, the animals would have died first and soil would have covered them building a cliff and the fossils up top would have died later. 3 people found this useful.
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Precambrian rocks The main reason more fossils are not found in the so–called Precambrian rocks is that many of these rocks have been altered, particularly by burial and tectonic pressure, and temperature (that is, they have been metamorphosed), and so the contained fossils have been destroyed.he main reason more fossils are not found in the so–called Precambrian rocks is that many of these rocks have been altered, particularly by burial and tectonic pressure, and temperature (that is, they have been metamorphosed), and so the contained fossils have been destroyed.
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- Igneous rock forms from magma; no chance for fossils to form there. Metamorphic rocks are other rock types that are changed by heat and pressure; their transformation and mineral reorganization causes very few fossils to be found there.
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- • Radioactive isotopes don't tell much about the age of sedimentary rocks (or fossils). • The radioactive minerals in sedimentary rocks are derived from the weathering of igneous rocks. • If the sedimentary rock were dated, the age date would be the time of cooling of the magma that formed the igneous rock. Radioactive isotopes don't tell much about the age of sedimentary rocks (or fossils). • The radioactive minerals in sedimentary rocks are derived from the weathering of igneous rocks. • If the sedimentary rock were dated, the age date would be the time of cooling of the magma that formed the igneous rock.
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What is a Fossil? Fossil Facts and Information Also, to find fossils, you need to look in sedimentary rock outcroppings. Other types of rock, such as granite are not formed by sediments accumulating, so animals will not be preserved in them. Sedimentary rock includes sandstone, shale, mudstone, limestone, and clay. Included here are some well known places to find fossils.
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- · just now. Report Abuse. Sedimentary Igneous rocks have cooled from molten rock, so are very unlikely to preserve any fossils (although casts have been found in lava, this is very rare). Metamorphic rocks have been heated and deformed, this normally destroys fossils. just now. Report Abuse. Sedimentary Igneous rocks have cooled from molten rock, so are very unlikely to preserve any fossils (although casts have been found in lava, this is very rare). Metamorphic rocks have been heated and deformed, this normally destroys fossils.
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What is a Fossil? Fossil Facts and Information Other types of rock, such as granite are not formed by sediments accumulating, so animals will not be preserved in them. Sedimentary rock includes sandstone, shale, mudstone, limestone, and clay. Included here are some well known places to find fossils.here are many ways an organism can become preserved as a fossil. Some of the ways include Casts and Molds, Permineralization, Replacement, and Carbonization Sometimes the fossil is unaltered, meaning it is the actual organism.
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Why are fossils found in sedimentary rocks? Sedimentary rocks can contain fossils because, unlike most igneous and metamorphic rocks, they form at temperatures and pressures that do not destroy fossil remains. Dead organisms can become sediments which may, under the right conditions, become sedimentary rock.edimentary rocks can contain fossils because, unlike most igneous and metamorphic rocks, they form at temperatures and pressures that do not destroy fossil remains. Dead orga … nisms can become sediments which may, under the right conditions, become sedimentary rock.
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3.3 Crystallization of Magma If the magma cools slowly, large crystals form in the rock. This can happen if the magma cools deep underground. Granite and gabbro are examples of this type of rock. They are intrusive igneous rocks because they form from magma underground. Unlike sedimentary rocks, igneous rocks do not contain any fossils. This is because any fossils in the original rock will have melted when the magma formed.
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Physical  Geography Give brief reasons to explain why they belong to the groups you choose: Granite, Mudstone, Shale, Slate, Basalt, Sandstone, Marble, Limestone, sand on the beach, a gritty rock full of fossils, a tomb stone that seems to be made of pink, black and white crystals. 2. Two igneous rocks are collected near the same volcano.
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- This molten rock or magma erupts on the seafloor to make a kind of volcanic rock called basalt,and it is this basalt that makes up the new seafloor (oceanic lithosphere).
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- Find a rock layer that has at least one of the fossils you found in the oldest rock layer. This rock layer would be younger as indicated by the appearance of new fossils in the rock stratum. Keep in mind that extinction is forever.elative dating tells scientists if a rock layer is older or younger than another. This would also mean that fossils found in the deepest layer of rocks in an area would represent the oldest forms of life in that particular rock formation.
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- The magma here also cools into rock, but at a much slower speed than the lava at the surface. This gives crystals more time to grow, making the larger-grained rock known as gabbro. So that’s why basalt is at the top of the ocean plate and gabbro is at the bottom. To put it in the form of the world’s worst poem:
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- By definition, basalt is an aphanitic igneous rock with less than 20% quartz and less than 10% feldspathoid by volume, and where at least 65% of the feldspar is in the form of plagioclase.Basalt features a glassy matrix interspersed with minerals.asalt is one of the most common rock types in the world. Basalt is the rock most typical of large igneous provinces. The largest occurrences of basalt are in the ocean floor that is almost completely made up by basalt.
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Why are fossils found in sedimentary rocks? Sedimentary rocks can contain fossils because, unlike most igneous  and metamorphic rocks, they form at temperatures and pressures that  do not destroy fossil remains. Dead … organisms can become sediments  which may, under the right conditions, become sedimentary rock.Metamorphic rocks are other rock types that are changed by heat and  pressure; their transformation and mineral reorganization causes  very few fossils to be found there. Sedimentary rock can be formed  from the accumulation of sediments and are often formed near  ancient shores, basins, and lake beds.
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3.3 Crystallization of Magma If the magma cools slowly, large crystals form in the rock. This can happen if the magma cools deep underground. Granite and gabbro are examples of this type of rock. They are intrusive igneous rocks because they form from magma underground. Unlike sedimentary rocks, igneous rocks do not contain any fossils. This is because any fossils in the original rock will have melted when the magma formed. 1  Page. 2  1. 3  2. 4  3.
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How does sedimentary rock form? Sedimentary rocks can contain fossils because, unlike most igneous and metamorphic rocks, they form at temperatures and pressures that do not destroy fossil remnants. The sedimentary rock cover of the continents of the Earth's crust is extensive, but the total contribution of sedimentary rocks is estimated to be only five percent of the total.
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What is basalt? Rockhound. Basalt is an igneous rock that forms from the relatively rapid solidification of basaltic lavas; that is, those magmas that are relatively high in iron and magnesium, and low in silica and aluminum.These features give basalt its dark color and higher relative density when compared to silicate igneous rocks.ockhound. Basalt is an igneous rock that forms from the relatively rapid solidification of basaltic lavas; that is, those magmas that are relatively high in iron and magnesium, and low in silica and aluminum.
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Why are fossils found in sedimentary rocks? Sedimentary rocks can contain fossils because, unlike most igneous and metamorphic rocks, they form at temperatures and pressures that do not destroy fossil remains. Dead orga … nisms can become sediments which may, under the right conditions, become sedimentary rock.
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Basalt Basalt is a dark-colored, fine-grained, igneous rock composed mainly of plagioclase and pyroxene minerals. It most commonly forms as an extrusive rock, such as a lava flow, but can also form in small intrusive bodies, such as an igneous dike or a thin sill. It has a composition similar to gabbro.he difference between basalt and gabbro is that basalt is a fine-grained rock while gabbro is a coarse-grained rock. Basalt underlies more of Earth's surface than any other rock type. Most areas within Earth's ocean basins are underlain by basalt.
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Sedimentary rocks The oldest layers are at the bottom and the youngest layers are at the top. Sedimentary rocks may contain fossils of animals and plants trapped in the sediments as the rock was formed. 1  Page. 2  1. 3  2. 4  3. 5  4. 6  5. 7  6.
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Fossils In the red layers of the Hermit Shale, plant fossils can be found in the mudstone and siltstone left behind by an ancient river system. Indicated by these fossils is a semi-arid climate, with drought-adapted seed ferns, horsetails, small pines, ginkgos, and a noticeable absence of true ferns.
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- Making the world better, one answer at a time. Shale rock has cleavage, not fracture. It breaks along the crystal planes in flat pieces, not in irregular pieces and in irregular places.aking the world better, one answer at a time. Shale rock has cleavage, not fracture. It breaks along the crystal planes in flat pieces, not in irregular pieces and in irregular places.
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The Earth's Layers Lesson #1 The seven continents and ocean plates basically float across the mantle which is composed of much hotter and denser material. The crust is composed of two basic rock types granite and basalt. The continental crust is composed mostly of granite. The oceanic crust consists of a volcanic lava rock called basalt. Basaltic rocks of the ocean plates are much denser and heavier than the granitic rock of the continental plates. Because of this the continents ride on the denser oceanic plates.
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Why do fossils form from sedimentary rock? Sedimentary rock can be formed from the accumulation of sediments and are often formed near ancient shores, basins, and lake beds. If an organism dies and is covered by sediments before rotting or being eaten by scavengers, it could eventually become part of the sedimentary layer that lithifies (becomes rock). third type of fossil is the impression left in soft sedimentary layers (particularly mud) of a track (foot step) or body--such as a leaf, shell, fish or bird. Igneous rock forms from magma; no chance for fossils to form there.