-are the flat, deep part of
the ocean floor, two to three miles
below sea level.
asymmetric ripple mark
-is a ripple mark with a
steep, short slope on the downstream
side of its crest and a low angle, long slope on the upstream side.
Preserved ripple marks of this type are indicators of
current directions of ancient streams.
-asymmetric ripple marks
-asymmetric ripple marks-closer view
-is a circular chain of coral islands surrounding a lagoon.
-is a long island built of
sand that runs parallel to the shoreline.
-is a relatively flat,
slightly dipping portion of the shoreline of a lake or ocean; may be covered
sand, gravel, or rocks.
-is the low sloping
submerged portion of the edge of a continent that ranges from the shoreline to a
depth of approximately 200 meters. Sediments deposited in this region are usually laid down in a
stable, quiet manner.
-is the steeper slope of
the submerged margin of a continent that extends from the continental shelf
to the continental rise; this region can be an active area of turbidity flows.
-is a primary sedimentary
structure in which one set of inclined sedimentary layers is beveled off
by an erosion process and a new set of sedimentary layers is deposited on top of the truncated
original layers; common in stream sediments and sand dunes.
-is a curved chain of
volcanic islands adjacent to an oceanic trench and overlying a subduction
-is a current moving parallel to the shoreline that is responsible for moving sand grains along the shoreline.
-is an underwater ridge
formed where two crustal plates are pulling apart. The Mid-Atlantic Ridge
and the East Pacific Rise are two good examples.
-occurs along the crest of
oceanic ridges where the oceanic crust is being pulled apart and lava is
filling the fissures, thereby creating new seafloor.
seismic sea wave
-is the correct term to use
in referring to large ocean waves created by earthquakes.
Earlier terms applied to these waves were tidal waves and tsunamis.
-is a linear extension of land into an ocean or lake; may consist of a sandbank, shoal, or reef.
spreading center volcanism
-occurs along an oceanic
ridge where seafloor spreading is occurring, lava emerges where the
oceanic plates are pulling apart and opening up fissures.
symmetric ripple marks
-are symmetric on both sides of the ripple mark.
Symmetric ripple marks are also known as
oscillation ripple marks because they are formed by the back and forth motion of waves.
-ripple marks on a California beach
-is a depression on the ocean floor where oceanic crust is being subducted.
-is the Japanese word for seismic sea wave. It actually means harbor wave.
-are sediments deposited by turbidity flows.
-turbidites-Anchor Bay, California-1
-turbidites-Anchor Bay, California-2
-turbidites-Anchor Bay, California-3
-turbidites cut by a fault
-turbidites with a normal fault
-is an underwater flow of
dense turbid water; sometimes this density current is caused by an
underwater avalanche on the continental rise which was triggered by an earthquake.
-is a mechanical weathering
force capable of breaking and rounding rock fragments through
-wave action along California coast
-wave action in Laguna Beach, California
enjoying wave action