Department of Energy Argonne National Laboratory Office of Science NEWTON's Homepage NEWTON's Homepage
NEWTON, Ask A Scientist!
NEWTON Home Page NEWTON Teachers Visit Our Archives Ask A Question How To Ask A Question Question of the Week Our Expert Scientists Volunteer at NEWTON! Frequently Asked Questions Referencing NEWTON About NEWTON About Ask A Scientist Education At Argonne Rock Formation Time

Name: Kiari
Status: student
Grade: K-3
Location: OK
Country: USA
Date: Spring 2012

About how long does it take for rocks to form?

The time it takes for rocks to form depends upon many things. Mostly it depends on the kind of rock.

Lava from a volcano becomes rock as soon as it cools. If the lava flows into the ocean, it can cool in just a few minutes. Rocks that form when water dries up, like rock salt, can form in a few days.

Other kinds of rock can take thousands or millions of years to form.

This may not the answer you were looking for, but I hope it helps.

Bob Avakian

Click here to return to the Environmental and Earth Science Archives

NEWTON is an electronic community for Science, Math, and Computer Science K-12 Educators, sponsored and operated by Argonne National Laboratory's Educational Programs, Andrew Skipor, Ph.D., Head of Educational Programs.

For assistance with NEWTON contact a System Operator (, or at Argonne's Educational Programs

Educational Programs
Building 360
9700 S. Cass Ave.
Argonne, Illinois
60439-4845, USA
Update: June 2012
Weclome To Newton

Argonne National Laboratory