Question

A parent rock goes through metamorphism. The resulting metamorphic rock is nonfoliated, contains intergrown mineral crystals, and reacts with hydrochloric acid. What was the parent rock and what is the resulting metamorphic rock

Answer 1

Parent rock - Limestone

Metamorphic rock - Marble

Explanation: Marble is a metamorphic rock formed from when Limestone undergoes metamorphism, which occurs when they are subjected to high temperature and pressure. They contain calcite and minerals such as Mica, quartz and intergrowth of mineral crystal. They also react with hydrochloric acid. They do not have foliation. Marbles are generally used for sculpting and construction materials. They have an hardness of about 3 on the Mohr scale and feels gritty to touch