Question

select all the correct answers.
the image shows a sandstone formation with visible bands of different colors. what do the bands indicate about how this sedimentary rock was formed?
choose two answers.
the rock was made from more than one type of material.
water was absent during the compaction and cementation process.
sediments and other matter were deposited in layers before lithification.
the rock was stretched horizontally by the pressure from surrounding rocks.
layers of hot liquids in the rock cooled and solidified at different temperatures.

Explanation:

1. For "The rock was made from more than one type of material": Different colored bands imply different materials (sediments) were involved, as each band likely represents a different sediment type.
2. For "Sediments and other matter were deposited in layers before lithification": Sedimentary rock formation involves sediment deposition in layers (stratification) before compaction/cementation (lithification), and the bands show these layers.

• "Water was absent..." is wrong (water is involved in sediment transport/deposition for sandstone).
• "Stretched horizontally..." relates to deformation (not band formation from deposition).
• "Layers of hot liquids..." describes igneous rock cooling, not sedimentary.

Answer:

A. The rock was made from more than one type of material
C. Sediments and other matter were deposited in layers before lithification