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It's because sedimentary rocks have big air spaces in them which makes them very porous, whereas igneous and metamorphic rocks are less porous, as the crystals are tightly packed.

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Is a sedimentary rock an igneous rock?

No. Igneous, sedimentary, and metamorphic rocks are three different categories of rock.


What is required to change an igneous rock into a sedimentary rock?

Igneous rocks are a "finished product". They do not become sedimentary rock - though sedimentary rocks, with heat and pressure can become metamorphic rocks.


What are 3 major rock types?

Igneous Rocks,Sedimentary Rocks,Metamorphic Rocks.


Why do rock fossils form in sedimentary rock and not in igneous rock?

because sedimentary rocks are on the top layer, while igneous rocks are were the magma is


What are the 3 rocks in the rock cycle?

Three (3) rocks in the rock cycle are sedimentary, igneous, and metamorphic rock.


How does a Sedimentary rock to an igneous rock?

The sedimentary rocks would have to melt and cool again to make an igneous rock.


What is the most common type of rock on earth's surface?

Sedimentary Rocks. 75% of rocks exposed to the surface are sedimentary.


How does a sedimentary rock contain pieces of igneous rocks?

Igneous rock pieces can stick together through cementation to form sedimentary rocks.


What type of rock is made from weathering and erosion?

Sedimentary rock is formed when igneous rocks weather to sediments, then the sediments compact to sedimentary rock. When Igneous rocks are subjected to heat and pressure but do not melt, they become metamorphic rock. When igneous rocks are melted they make other igneous rocks.


Why in a thousand years could a lump of igneous rock stand will above the rest of the landscape?

Igneous rock is hard. If the surrounding rock is softer it will erode more quickly. Sedimentary rocks in particular can be very soft.


How are metamorphic rocks igneous rock and sedimentary rocks different?

Metamorphic rocks originate as igneous and sedimentary rocks, but have been changed by heat and pressure.


CAN Metamorphic rocks occur from sedimentary and igneous rocks?

Yes, both sedimentary and igneous rock can be metamorphosed by heat and pressure.