What color marine sediments indicate that the ocean was rich in marine life?Group of answer choicesgreywhitegreenbrownbrown

The color of marine sediments can provide insights into the biological productivity of the ocean. Generally, sediments that indicate a rich marine life are often associated with high organic content. Here’s a breakdown of the color choices:

1. Grey: Typically indicates a general marine environment; can be rich but not necessarily indicative of high productivity.
2. White: Often signifies carbonate sediments, which may not necessarily mean high organic productivity.
3. Green: Associated with areas of high organic productivity, particularly where certain types of algae are prevalent, such as green algae.
4. Brown: May indicate areas rich in organic material, often derived from decomposed organic life, but can also represent sediment consisting of terrestrial input.

Final Answer

Green marine sediments indicate that the ocean was rich in marine life.