Coral Reef study questions
Terms in this set (46)
fringing, barrier and atolls
What are the three main categories of coral reefs?
What is the simplest and most common reef?
Close to shore and consist of inner flat reefs
Where are fringing reefs found?
They will make their own hard bottom
What will fringing reefs do if they do not have a hard bottom?
What kind of reef is the largest reef?
Red sea not the Great Barrier Reef
Where is the largest reef?
inner reef flat and an outer reef slope
What do fringing reefs consist of?
close to shore
Where do fringing reefs grow?
widest part of the reef
What is a reef flat?
the reef slope
Where is the densiest cover in a reef?
What is the shallow upper edge of the reef slope?
sediment and coral rubble
What settles ar the base of a reef?
steep sometimes vertical
How are some reef slopes built?
because it is away from the shore
Why does the fresh water run off of the reef?
they provide circulation, nutrients and zooplankton
what do waves do to the slope?
fringing and barrier reefs
What two reefs are very similar to one another?
they are farther from the shore
How are barrier reefs different from fringing reefs?
What might separate a barrier reef from a fringing reef?
patch reefs, coral knolls, pinnacles
What are scattered coral formation known as?
black reef slopes, reef flat, and a fore-reef slope
What does a barrier reef consist of?
slightly below the coral reef crest
Where is the richest coral growth?
decreases with depth
What happens to the diversity of coral in the barrier reef as you go deep?
What do the waves and currents pile up the sand and form small islands like the Keys in the United States?
finger like projections alternating sand channels
What is on exposed fore-reef?
spur and groove or buttresses
What is formed by wind and waves or both, but no one is sure?
stout and compact and massive
How is the coral described at the crest of the barrier reef?
branches, columns, and whorls vertically
What is the variety of way that the coral is formed below the crest?
flat in sheets
How does coral tend to grow on the reef slope of deeper reefs?
The Great Barrier Reef
What is the most famous barrier reef?
What is a ring of reef called?
Indo-West Pacific region
Where are the vast majority of atolls located?
steep outer slope and an enclosed shallow lagoon
What are atolls made of ?
they can be found far from land
Why are atolls different from barrier and fringing reefs?
lie in the trade wind belt
Why are atolls strongly influenced by wind and waves?
What is the side of the atoll that faces the prevailing wind called?
What is the sheltered side of an atoll called?
What are the steadiest winds on Earth, blows from latitudes of about 30 degrees towards the equator?
it begins a fringing reef around a volcanic island
How do atolls begin?
reef flat gets wider and deeper
What happens as the island sinks and becomes an atoll?
What did the encrusting coralline algae create to endure the constant pounding of waves?
Where is the algal ridge more prominent on an atoll the leeward or the windward side?
He believed that atolls could be explained by reef growth on subsiding islands
How did Darwin believe atolls were formed?
sediment and runoff
what is the inner reef strongly effected by?
the coral dies and the reef becomes eroded
What happens to the atolls when the sea level is low?
it may be drowned or unable to grow
WHat happens when the sea level rises rapidly?
The water may be hundreds even thousands of meters deep
How deep can the water be near the atoll?