Provide a detailed rock description. Must include: - Modal minerology (e.g. 35%

Question

Provide a detailed rock description.

Must include:

- Modal minerology (e.g. 35% quartz, 25% plagioclast etc.),

- Detailed description (e.g. Sample X1 is a light-coloured rock, with pinkish K-feldspar crystals. The sample is coarse grained (grainsize range: 2-10 mm), phaneritic, and has a weakly porphyritic texture, with K-feldspar phenocrysts being larger than the other minerals on average. Plagioclase, K-feldspar and biotite exhibit subhedral microstructures, quartz is anhedral. The rock exhibits no obvious metamorphic fabrics (foliation is absent))

- other features

- A Rock name

Explanation / Answer

LAB based QUESTION

Rock Name: Conglomerate

Description:

The key characteristic of conglomerate is the presence of readily visible, rounded clasts bound within a matrix. The clasts tend to feel smooth to the touch, although the matrix can be either rough or smooth. The hardness and color of the rock is highly variable.

When the matrix is soft, conglomerate may be crushed for use as a fill material in the construction and transportation industries. Hard conglomerate may be cut and polished to make dimension stone for interesting-looking walls and floors.

Features:

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