Essentials of Geology
4th Edition
ISBN: 9780393919394
Author: Marshak, Stephen
Publisher: W W Norton & Co Inc
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Question
Chapter 15, Problem 2RQ
To determine
The lithospheric differences between the continent and abyssal plains.
Expert Solution & Answer
Answer to Problem 2RQ
The lithosphere beneath the continent is much thicker than the lithosphere beneath an abyssal plain.
Explanation of Solution
The Earth’s lithosphere consists of the crust and a portion of the upper mantle. Abyssal plains are the underwater smooth horizontal ocean floors on the Earth’s surface and are commonly found at depths between 3000 m to 6000 m.
The lithosphere beneath a continent is thicker, and the crustal parts mainly consist of granite, diorite, sedimentary rocks, and sediments. The lithosphere beneath an abyssal plain is thinner, and it consists of basalt and gabbro.
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