they dont have an origin, they are in (the whole earth is) what is called the rock cycle
its like the chicken and the egg question to suggest the origins of rocks. their structure changes based on what minerals are present and temperatures and pressures are present at the time of formation in either the earths crust or mantle. there are 3 groups of rocks: Igneous: come form magma in earths mantle/crust (volcanic rock) Sedimentary: laid down in beds/layers from deposition of ancient seas and rivers Metamorphic: rocks that are subjected to immense pressure and temperature of different levels of the earth (deeper -the higher the pressure and temp)
The parallel arrangement of mineral grains in a rock that gives it a striped appearance is called foliation. This typically occurs in metamorphic rocks due to the alignment of minerals under pressure and heat, resulting in distinct bands or stripes. Foliation can provide clues about the rock's history and the direction of metamorphic forces.
The alignment of minerals to form a planer fabric. This may give the rock a banded appearance.
Igneous Rock
because fossils are in sedimentary rock
I am learning about this in my Science class, and when a geologist looks at an extrusion, they know it's an extrusion because it is Igneous rock, and an extrusion helps tell the reletive ages of the layers around it.
Mineral texture provides clues as to the origin of the rock particles and the processes which lead to the rock's formation. Texture would include the size and arrangement of the mineral crystals or particles found in the body of a rock.
Extrusion provides geologists with clues about the type of lava that erupted from a volcano, the direction of lava flow, the age of the eruption based on the surrounding rock layers, and potential past volcanic activity in the region. It can also give insight into the geological processes that have shaped the landscape over time.
The mineral composition and texture of the rock are most important in determining how a rock was formed. These factors provide clues about the conditions under which the rock formed, such as temperature, pressure, and the presence of fluids. By analyzing these characteristics, geologists can infer the rock's origin and history.
Rocks are identified by a number of things. Clues lie in its color, mineral composition, size and orientation of grains or crystals, hardness, stratification, layering, banding, density, vesicularity, reaction to acids, fracture, and chemical composition. A website that has a rock identification flowchart is available below.
The parallel arrangement of mineral grains in a rock that gives it a striped appearance is called foliation. This typically occurs in metamorphic rocks due to the alignment of minerals under pressure and heat, resulting in distinct bands or stripes. Foliation can provide clues about the rock's history and the direction of metamorphic forces.
The alignment of minerals to form a planer fabric. This may give the rock a banded appearance.
Xenoliths are pieces of rock that become incorporated into a larger rock during its formation. They are typically of a different composition and origin than the surrounding rock, providing clues about the processes happening beneath the Earth's surface. Xenoliths are often brought to the surface through volcanic eruptions.
I don't think it has an origin. Its more of a common sense saying. Rock= hard therefor hard as a rock.
Igneous Rock
because fossils are in sedimentary rock
penis rock
No, marble is not transparent. It is a metamorphic rock composed primarily of minerals like calcite or dolomite, which give it a characteristic opaque appearance.