Flood basalt

High school (ages 12+)
Geography

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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/flood-basalt

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. What is the rock type?Predominantly basalt, a dark, fine-grained extrusive igneous rock
2. What is the associated phenomena?Linked to mantle plumes, significant climate change, and major mass extinction events
3. How do flood basalts form?They form when hot mantle material rises as a plume, melts, and produces large volumes of basaltic magma. The magma then erupts slowly through long cracks or big volcanic centers.
4. Why do flood basalts create step‑like landscapes?Each layer of lava cools and hardens into a resistant caprock. Rivers and glaciers later erode these layers, exposing the edges of each flow and making a staircase‑like appearance.

Flood Basalt: Extremely large-scale volcanic eruptions covering vast areas with basaltic lava flows.
Mantle Plume: A hypothesized upwelling of hot, solid rock from deep within the Earth's mantle.
Large Igneous Province (LIP): Vast accumulations of igneous rocks, primarily mafic, formed during short-lived eruptive periods.
Deccan Traps: A major flood basalt province in west-central India, formed by eruptions around 66 million years ago.