Huronian glaciation

High school (ages 12+)
Environment & Earth

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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/huronian-glaciation

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 geological unit?Associated with the deposition of the Huronian Supergroup
2. What is the primary lithological evidence?Widespread diamictite formations interpreted as glacial tillites
3. What was the Huronian glaciation and when did it happen?It was a long series of ice ages that took place about 2.5 to 2.2 billion years ago, making Earth very cold.
4. How do scientists know that the Earth was covered in ice so long ago?They find thick layers of mixed rocks called diamictites, which look like deposits left by glaciers, and they also see dropstones and scratches on rocks that glaciers would make.

Paleoproterozoic Era: An ancient geological eon spanning from 2.5 to 1.6 billion years ago, characterized by significant geological and biological developments.
Diamictite: A non-sorted or poorly sorted sedimentary rock containing a wide range of particle sizes, often indicative of glacial deposition.
Isostatic Depression: The sinking of the Earth's crust under the immense weight of ice sheets, which rebounds when the ice melts.
Albedo Feedback: A climate process where changes in reflectivity (like ice cover) amplify initial temperature changes.