Rock puzzle Crossword

Rock that was formed by organic plant matter
This rock was made by compacted layers of sediments
Type of volcanic glass
Type of rock that contains inorganic matter
Organism's remains preserved in a rock
Erosion wth elements
Formed with great pressure on granite
Erupted out of a volcano
Marble's 'parent rock'
Rock type that is changed by heat and pressure
Type of rock that is formed from magma
Rock type made from molten metal
Scientific name for 'fool's gold'
Rock that is formed from molten lava that has cooled quickly
Process of heating and squashing a non-metamorphic rock
What are bricks made from?
Type of rock that would most likely hold the leaf of a prehistoric fern
Coarse-grained sedimentary rock
Scientific name for 'Breaking apart'