What should a geologist look for if hoping to find copper deposits

Search for rocks that are green or pieces of ore that have green flecks. The green hue is characteristic of copper. Remove samples of the rocks and take them back to the lab for testing. If the rocks have a high part per million counts of copper, then you may have found a copper deposit.

Explanation:

The high temperatures of volcanic magma create hydrothermal veins, allowing some of the heat to escape near the upper layers of the Earth's crust. This is why copper is often found in the sedimentary layer, where sand and mud are compressed until they form a layer of sedimentary rock on the surface of the earth.