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A type of coal called anthracite Is classified by geologists as a metamorphic rock and it is much harder than sedimentary coal so can you describe how you think anthracite forms?
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Why do some geologists consider glacial ice to be a metamorphic rock?
Probably because the subsurface ice in a glacier has recrystallized, much as the minerals in some sedimentary rock do when undergoing metamorphism.
Geologists can use sedimentary rock to learn about climate in the past?
By looking at the sedimentary and studying it
How do you classify rocks?
Geologists classify rocks by looking at their chemical and mineralogical composition then at the the size and shape of their component minerals then at any texture, pattern or grain that the rocks may display. They also classify them in relation to how they were formed.
How do geologists know that shallow seas once covered the central part of North America?
Geologists based their findings because of fossils. Fossil distribution identifies the ancient areas of land & sea, & also determines the approximate shoreline.
Why geologists break a rock before examining it?
Most rocks are subjected to weathering and erosion and it is difficult to see what a rock is made of if it is weathered. That is why geologists break rocks, to see a fresh example of the rock. It is also the best way of finding fossils in the field if you are working in an unfamiliar area.
What are the three main categories into which geologists classify rocks?
Sedimentary, metamorphic and igneous.
Why don't geologists find fossils in a metamorphic rock?
Metamorphic rock is formed deep in the Earth's crust under tremendous heat and pressure. Fossiles are formed in sedimentary rock near the surface.
How do geologists classify rock?
Geologists classify rocks into three groups. The first group are igneous rocks, the second are metamorphic rocks and the third are sedimentary rocks.
Why do some geologists consider glacial ice to be a metamorphic rock?
Probably because the subsurface ice in a glacier has recrystallized, much as the minerals in some sedimentary rock do when undergoing metamorphism.
What are two features geologists use to classify rocks?
Rocks are classified by mineral and chemical composition, by the texture of the constituent particles and by the processes that formed them. These indicators separate rocks into igneous, sedimentary, and metamorphic. They are further classified according to particle size. The transformation of one rock type to another is described by the geological model called the rock cycle.
How do geologists classify metamorphic rock?
Geologists classify metamorphic rocks by the arrangements of the grains that make up the rocks.
Geologists can use sedimentary rock to learn about climate in the past?
By looking at the sedimentary and studying it
What do geologists call a single layer of sedimentary rock?
A stratum.
The type of rock formation most useful to historical geologists is?
Sedimentary
List four ways geologists classify rocks?
sedimentary,metormorphic , igneous .........
Do geologists classify metamorphic rocks by the arrangement of grains making up the rock?
Yes.
How do you classify rocks?
Geologists classify rocks by looking at their chemical and mineralogical composition then at the the size and shape of their component minerals then at any texture, pattern or grain that the rocks may display. They also classify them in relation to how they were formed.
