K-12 Teaching and Learning From the UNC School of Education

LEARN NC was a program of the University of North Carolina at Chapel Hill School of Education from 1997 – 2013. It provided lesson plans, professional development, and innovative web resources to support teachers, build community, and improve K-12 education in North Carolina. Learn NC is no longer supported by the School of Education – this is a historical archive of their website.

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Another overwash fan
In Small sand volume barrier islands: Environmental processes and development risks, page 13
Figure 11 shows the last overwash fan on this trip, I promise. This one destroyed the dune over which this walkway was built and moved the sand landward to cover the walkway deck in the background. If you look closely you will see a change in color on the...
By Dirk Frankenberg.
Back-barrier salt marsh
In Large sand volume barrier islands: Environmental processes and development risks, page 6
Figure 5 shows the back-barrier salt marsh with a dune crest visible on the right and an area of maritime forest in the left background. This will allow you to confirm your estimate of the height of the dunes and the role these high dunes have in protecting...
By Dirk Frankenberg.
Beach accretion
In Hurricanes on sandy shorelines: Lessons for development, page 16
Figure 13 shows some more of the sand that was eroded off the Oak Island beach by Hurricane Floyd. It is a little hard to see, but if you look at the base of the stairs leading down from the deck of this house, you will see that sand covers at least the two...
By Dirk Frankenberg.
Beachfront dune
In Large sand volume barrier islands: Environmental processes and development risks, page 12
Figure 11 shows a close up view of the largest beachfront dune in Figure 10 (the steep fronted one in the left background of that photograph). In this close-up view you can see that this dune is already starting to be restored by sand collecting at its base....
By Dirk Frankenberg.
Beachfront Dune
Beachfront Dune
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Bear Island Dunes
Bear Island Dunes
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Bear Island dunes (1)
In Large sand volume barrier islands: Environmental processes and development risks, page 4
We will begin our trip by visiting Bear Island, the undeveloped island of the pair of large sand volume barrier islands. Figure 3 shows the high volume sand dunes on Bear Island. These dunes are about 50 feet high and cover an area about 5 miles long and one-half...
By Dirk Frankenberg.
Bear Island dunes (2)
In Large sand volume barrier islands: Environmental processes and development risks, page 5
Figure 4 shows the crests of dunes on the landward side of Bear Island and the back-barrier salt marsh stretching toward the mainland. By estimating the distance from the dune crests to the salt marsh surface, we can see that the dunes are tall, and once again...
By Dirk Frankenberg.
Bogue Inlet
Bogue Inlet
Format: image/photograph
Burying Nags Head Woods
In Natural and human impacts on the northern Outer Banks, page 7
Figure 6 is a view to the northwest, showing the Run Hill Dune migrating over Nags Head Woods. Notice the steep slope of the southwestern face of the dune, formed by the strong northeast winds.
By Blair Tormey and Dirk Frankenberg.
Coquina Beach
In Natural and human impacts on the northern Outer Banks, page 12
Storm overwash is one of the more prevalent processes with which humans must cope on the Outer Banks. During storms, large volumes of sand are eroded from the seaward side of the islands and redeposited in large overwash fans, which extend landward across...
By Blair Tormey and Dirk Frankenberg.
Coquina Beach
Coquina Beach
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Dune building and stabilization project on Bogue Banks
Dune building and stabilization project on Bogue Banks
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Dune debris in Great Sand Dunes National Park, CO
Dune debris in Great Sand Dunes National Park, CO
The dunes in Great Sand Dunes National Park, Colorado. The dunefield covers thirty square miles in the San Luis Valley. It is home to the tallest dunes in North America; the highest, Star Dune, towers at 750 feet. The Sangre de Cristo Mountains, visible in...
Format: image/photograph
Dune destruction without structural damage on Oak Island
Dune destruction without structural damage on Oak Island
Format: image/photograph
Dune erosion on Bear Island
In Hurricanes on sandy shorelines: Lessons for development, page 10
Figure 7 shows that not all of the barrier islands are flattened when hurricanes make landfall over them. This photograph shows the beach and seawardmost dunes of Bear Island after five hurricanes battered them in two years. The remnants of dead maritime thicket...
By Dirk Frankenberg.
Dune Erosion on Bear Island(east End of bear island)
Dune Erosion on Bear Island(east End of bear island)
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Dune formation
In Natural and human impacts on the northern Outer Banks, page 4
The migration of dunes in response to the prevailing winds is an important process on the Outer Banks. Nags Head Woods is flanked on three sides by large dune fields. To the north of the woods is the Run Hill dune field. Run Hill Dune is an unusually large,...
By Blair Tormey and Dirk Frankenberg.
Dune grasses
In Large sand volume barrier islands: Environmental processes and development risks, page 18
There are things people can do to retain or increase sand volume on barrier islands. One of these is to plant dune grasses like those in Figure 17. Not only do such plantings stabilize the sand that already exists by reducing the ability of wind to move it...
By Dirk Frankenberg.
Dune in Coral Pink Sand Dunes State Park, Utah
Dune in Coral Pink Sand Dunes State Park, Utah
Clumps of yellow wildflowers sprout from a dune in Coral Pink Sand Dunes State Park, in Kanab, Utah. The sharp spine of the dune arcs in a graceful curve. The sand is eroded from Navajo sandstone from the Middle Jurassic geologic period, and its hue is derived...
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