And, at the fossil trench at Marsh's Quarry, on Wren's Nest, you can still see the ripple marks
made by the waves on the ancient sea bed of our own Atlantis.
Additionally, the well-washed, sublitharenite sandstone, occasional ripple marks
in the sandstone, and the preferred orientation of coprolites on the bedding plane, all point to periodic moderate-to-high energy conditions.
on the sandstone indicate the creature was struggling to swim against a current.
left by the sea can still be seen in the sandstone on the summit of Pen y Fan.
Most of us admit that our very best pictures of rocks were achieved by surreptitiously pointing our cameras over his shoulder when he had carefully selected the right angle to catch the shadows on a mountain range or on a row of ripple marks
. Our printed products were good but never as good as the Master's.
Fossilised ripple marks
in sand formed by water currents are preserved at Black Pastures Quarry, near Chollerford, where even the casts created by burrowing worms 325 million years ago can be seen.
At the bottom of the steps leading up to the jubilee tower at Castle Hill look for the ripple marks
still visible on the paving stones.
"The clincher for some of the water being on the surface is crossbeds and ripple marks
in the rocks," says Mars rover project scientist Joy A.
The pattern of ripple marks
and other features locked in southwestern Utah's sandstone indicates that the mineral grains had been blown in from those directions.
Schlieren exhibit layering similar to cross-bedding and preserve ripple marks
along their base.
Canyon walls may also contain other structures, such as fossilized ripple marks
. These marks, which look just like ripples in the sand on a beach, occur when ancient streambeds have been converted into rock and petrified.