SEDIMENTOLOGY
Ripples formed in sand along a beach. (Sandy Hook, NJ)
Ripple marks in sandstone exposed on the bedding surface of the rock layer. (Pennsylvania)
SEDIMENTOLOGY |
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| RIPPLE MARKS | ||
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| MODERN RIPPLES: Ripples formed in sand along a beach. (Sandy Hook, NJ) |
ANCIENT RIPPLES: Ripple marks in sandstone exposed on the bedding surface of the rock layer. (Pennsylvania) |
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| ENVIRONMENTAL INTERPRETATION: Ripples develop when sediment is carried by a moving current (water or wind). | ||
| MUDCRACKS | ||
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| Polygonal shaped cracks on this bedding surface are related to the cracking that occurs when the original muddy sediment dries and shrinks. | ||