A Well-Sorted Sandstone with Ripple Marks Was Most Likely Deposited

question 41

Multiple Choice

A well-sorted sandstone with ripple marks was most likely deposited as sand by a

• A) beach.
• B) glacier.
• C) river (near source).
• D) alluvial fan.

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Definitions:

Lancelets

Small, fish-like marine animals belonging to the subphylum Cephalochordata, known for their role as a model organism in evolutionary biology.

Nephridiopores

External openings of the nephridia, which are excretory organs in many invertebrates, allowing waste to exit the body.

Nephridia

Excretory organs in many invertebrates, including annelids and mollusks, that filter fluid directly from the body cavity.

Mollusks

A diverse group of invertebrate animals with a soft body, many of which have a hard shell, including snails, clams, and squid.