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Author Question: Columnar jointing in lava flows occurs due to ____. A)pyroclastic welding B)basaltic crystal ... (Read 93 times)

Charlie

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on: Jul 13, 2018
Columnar jointing in lava flows occurs due to ____.
 A)pyroclastic welding
 B)basaltic crystal formation
 C)contact of the lava flow with sea water
 D)the expansion of lava flow materials
 E)cooling and contracting of lava flows

Question 2

Early gases that had begun to accumulate around Earth during the Early Archean were lost because of a lack of a(n) ___________________ _.
 Fill in the blank(s) with correct word


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diesoon

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Reply #1 on: Jul 13, 2018
Answer to Question 1

E

Answer to Question 2

magnetosphere


Charlie

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Reply #2 on: Jul 13, 2018
TY


diesoon

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Reply #3 on: Jul 13, 2018
Happy to Help


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