Pockmark (geology)

High school (ages 12+)
Environment & Earth

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/pockmark--geology-

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. Who discovered Pockmark (geology)?Late 1960s, facilitated by advancements in side-scan sonar technology
2. What is the location?Worldwide distribution on continental margins, shelves, slopes, and in lakes
3. What is the primary formation mechanism?Expulsion of subsurface fluids (gases like methane, and liquids) through unconsolidated sediments
4. What is a pockmark?A pockmark is a round, hollow spot on the ocean floor that looks like a tiny crater. It is made when gas or liquid pushes up through the sediment and makes a hole.
5. How do pockmarks form?They form when gas, mainly methane, or liquid moves up from deep underground and bursts out of the seafloor. The pressure pushes the surface down, creating a crater.

Fluid Expulsion: The process by which liquids or gases are forced out from beneath the Earth's surface.
Gas Hydrates: Crystalline solids formed from gas (like methane) and water under specific pressure and temperature conditions.
Hydrocarbon System: A geological setting containing the necessary elements for the generation, migration, and accumulation of oil and natural gas.
Bathymetric Mapping: The process of measuring and mapping the depths of oceans, seas, and lakes.