Question

Which of the following observations would suggest that a rock sample is sedimentary?

a) Interlocking crystals
b) Layered structure
c) High silica content
d) Glassy texture

Answer 1

A b. layered structure suggests that a rock sample is sedimentary, as beds and laminations are typical features of sedimentary rocks.

Step-by-step explanation:

The observation that suggests a rock sample is sedimentary is a b. layered structure. In sedimentary rocks, layering or stratification is a key feature, which includes beds thicker than 1 cm and finer laminations for layers thinner than 1 cm.

Sedimentary rocks often display sedimentary structures such as cross-bedding, ripple marks, and mud cracks. These are observed in outcrops rather than hand samples and can show the direction of sediment transport.