Chapter 10 Beaches, Shorelines, Coast

Which way would sediment move if NO beach drift existed?

At an angel to shore

What type of feature is a barrier island?

Depositional

What is the most obvious difference between summertime and wintertime beaches?

During summertime, there is much more sand on the beach.

In which area(s) of a barrier island is peat formed? - Two answers

High salt marsh and Low salt marsh

Why does the beach in the video look the way that it does during wintertime?

Large waves move sand offshore onto longshore sand bars and create a rocky beach

Which of the following processes is responsible for the movement of sand down the beach?

Longshore transport

In the long term, What do beach drift and longshore current do?

Move sediment parallel to the shoreline

When there is longshore drift, the overall direction of sand transport is __ to the coast

Parallel

In order to produce longshore drift the direction of waves must not be ___ to the coast

Perpendicular

Which of the following beach compartment-to-submarine canyon affiliation is incorrect?

Redondo : Mugu

Which of the following is/are part of a beach compartment?

River Beach Submarine Canyon

Landforms associated with longshore drift from where the ___ is plentiful enough to create them

Sediment

Why does the beach shown in the video look the way that it does during summertime?

Small waves move sand up the beach face and create a wide, sandy beach.

What process formed the submarine canyons off the Southern California coast?

Some were carved out by rivers when sea level was lower than it is at present, but most form from the erosive action of turbidity currents

What are submarine canyons?

Steep-sided valleys cut into the continental slope

What happens to a barrier island as sea level rises? - Two Answers

Structures on the island are at risk due to increased erosion. and Peat deposits are exposed on the ocean beach side of the barrier island.

Normally, beaches have the greatest amount of sand on the berm near the end of___

Summer

Where are barrier islands common? -two answers

The Gulf coast of the United States and East coast of the United States

What is the longshore current

Water forced by waves to move along the shore

How is a cave created in a cliff face along a sea coast?

Wave action erodes areas of weakness in rock in a sea cliff

How is an arch formed along a sea coast?

An arch forms when a sea cave breaks though a headland or where two sea caves coalesce as they erode back due to wave action

How does a sea stack form?

A stack forms when a sea arch collapses leaving a vertical column of rock offshore.

In which area of a barrier island would you expect to find a woodland or forest?

Barrier Flat

A ___ forms when a longshore drift creates a ridge of sand separating a waterway from the ocean

Baymouth Bar

How does the tide cycle affect erosion along a sea coast?

The tide cycle causes erosion to occur at different elevations along a sea coast

Waves hitting at an angle and then bending around features of the coast is known as

Wave refraction