Question

an unknown mineral is found in a dry lake bed. a geologist identifies that this mineral is clear and salty. what is the most likely way this mineral formed?

• sedimentation
• precipitated from water
• crystallization of magma
• weathering and erosion

Explanation:

Minerals that are clear and salty are often formed by the precipitation of dissolved minerals from water. When water evaporates, the dissolved minerals (such as salts) are left behind and form crystals. Weathering and erosion would break down rocks and minerals rather than form new ones. Crystallization of magma forms igneous rocks and minerals like quartz, feldspar etc., which are not typically salty. Sedimentation involves the accumulation of sediments (particles) and not directly related to forming a clear and salty mineral in the context of a dry lake bed where water evaporation is key.

Answer:

B. precipitated from water