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L46 Fossilized ripple marks on titled rock beds. Cornwall, UK
Position:
N50° 44'
W04° 39' approx.
Elevation:
at sea level
Image format:
35mm
RIPPLE MARKS ON TILTED ROCKS
Tilted beds of SANDSTONE and MUDROCK show interesting structures
that give clues to their origin. Most visible are the RIPPLE MARKS.
They may have been formed by WIND or moving water but other evidence
suggests the latter. In fact these 300 million year old rocks
formed on the ocean bottom as part of a TURBIDITY FLOW. The ripples
preserved on the surface of the then soft sediments, indicate
the direction and the gentle nature of the flow.
Less detail
Image Trail:
L23 Sand dunes and wind ripples. Death Valley. California, USA
L35 Fossilized ripple marks. Capitol Reef National Park. Utah, USA
L73 Fossilized sand dunes, Navajo Sandstone, Zion National Park,
Utah
Links:
www.geology.uvm.edu/vtlandforms/gl_rippl.htm
www.geology.sdsu.edu/visualgeology/geology101/riplmrks.htm |
