Molten lava cooled and hardened
Changed Rocks
No, pebbles are not necessarily igneous rocks by default. Pebbles can be formed from a variety of rock types, including igneous, sedimentary, and metamorphic rocks, depending on the geological processes that created them.
The black in igneous and metamorphic rocks could be any of numerous black minerals. Two that are commonly found are biotite mica and hornblende.
Igneous rocks are rocks that form from the cooling of magma or lava, and "igneous" is derived from the Latin word for "fire." Examples of igneous rocks include basalt, granite, and pumice.
Sedimentary, igneous and metamorphic.
igneous
To the people that are doing the "Rock Worksheet" the answer for problem #5 is in the paper but the answer is actually (what I put), "Another name for igneous rocks is the rock of fire."
Examples of igneous rocks are pumice, obsidian, basalt, and rhyolite.
Igneous, sedimentary, and metamorphic rocks are the three main types of rocks. Igneous rocks are formed from the cooling of molten rock, sedimentary rocks from the accumulation of sediment, and metamorphic rocks from the transformation of existing rocks under heat and pressure.
The rock cycle.
i think igneous rock
Igneous, Sedimentary, and Metamorphic