ROCKS Crossword
This printable crossword puzzle on the topic of Rocks & Minerals has 10 clues. Answers range from 4 to 12 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.
Description
a pale‑coloured rock
heavier than pumice, and darker because it contains more iron.
an extrusive rock that can take on many appearances
a smooth, black rock that looks like glass.
common intrusive rock.
has grains slightly larger than those of mudstone.
contains grains of different sizes that have been cemented togethe
formed from the remains of dead plants that are buried by other sediments.
sedimentary rock that is formed from deposits of the remains of sea organisms such as shellfish and corals.
the powdery mark left by a mineral when it is scraped across a hard surface like an unglazed white ceramic tile
