Igneous Rocks with a Two-Stage Intrusive-Extrusive Origin Are Recognized by a Texture

question 7

Multiple Choice

Igneous rocks with a two-stage intrusive-extrusive origin are recognized by a texture that is:

• A) aphanitic.
• B) porphyritic.
• C) glassy.
• D) phaneritic.
• E) pyroclastic.

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Definitions:

2-Ketohexose

A category of hexose sugars characterized by having a ketone functional group in the second position of the carbon chain.

NaBH4

Sodium borohydride, a chemical compound used as a reducing agent in organic synthesis.

Alditol

A type of sugar alcohol formed by the reduction of the aldehyde or ketone group in monosaccharides.

L-Erythrose

A four-carbon sugar, or tetrose, with the chemical formula C4H8O4, one of the simplest aldose configurations.