Question

Obsidians glassy texture indicates that it formed

Answer 1

Answer:

on the surface rapidly

Explanation:

Obsidian glassy texture indicates that the rock formed on the surface rapidly.

Like every other magma, the condition of the environment determines how the magma cools and solidifies.

• When magma cools rapidly, nucleation centers will be difficult to come- by ..
• At nucleation centers, minerals aggregates and grows to form different grain sizes.
• When rapid cooling occurs, not enough time is given for the aggregation around the nucleus.
• This leaves a rock mass that is finely grained.