cross-stratification

Science Dictionary
cross-stratification  
An arrangement of sediment strata deposited at an angle to the main stratification. The most common type of cross-stratification is produced by the migration of sand dunes or ripples. ◇ Cross-stratification in which the individual strata are greater than 1 cm (0.39 inch) in thickness is called cross-bedding. ◇ Cross-stratification in which the individual strata are less than 1 cm (0.39 inch) in thickness is called cross-lamination.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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