A geologist discovers a new rock formation. The rock is dark in color and appears to have formed in layers. The layers are thick and not parallel but instead show some folding. Which type of rock did the geologist most likely find?

Sedimentary rock

Explanation:

The rock with the layer is generally sedimentary rock.

Rocks are of three types.

1. Igneous rock

2. Sedimentary rock

3. Metamorphic rock

So sedimentary rocks are formed by diagnosis of weathered material obtained by erosion by wind, water weathering. The weathered material transported and deposit and form sedimentary rock.

Gneiss

Explanation:

A gneiss a metamorphic rock that is formed by the high pressure and temperatures and is composed of the igneous rocks or the sedimentary rocks and is found in the banded texture that is characterized by the alternative darker and the lighter bands and have bandings which are not parallel and contain light elements like the silicon and the aluminum and the sodium and they appear to be folded and faulted rocks.