Which of the following matches a sedimentary rock with a possible metamorphic equivalent?

A) sandstone - greenstone
B) basalt - marble
C) limestone - quartzite
D) shale - slate
E) none of these

Sedimentary Rock

Rock formed from the accumulation or deposition of mineral or organic particles, often in layers, hardened over time by pressure and cementation.

Metamorphic Equivalent

A rock resulting from the metamorphism of an initial rock type, transforming its mineral composition or structure.

Greenstone

A metamorphic rock, typically formed under low-grade conditions, that has a greenish color due to the presence of minerals such as chlorite, epidote, or actinolite.