LEARN NC: Search results

Sediment salt marshes: In A blackwater river from sea to source: The White Oak River transect, page 6; Figure 4 shows salt marshes growing inside the mouth of Bogue Inlet on sediment that has settled out of flooding tides. Areas of open water separate these marshes, but there is clearly more marsh than open water this close to the inlet. How these plants got...; By Dirk Frankenberg.

White Oak River estuary: In A blackwater river from sea to source: The White Oak River transect, page 8; Figure 6 is a view of the high salinity, open water area of the White Oak River estuary about 4 miles inland of the mouth. Salt marsh still occurs on the estuary floor, but it is clearly much less extensive than closer to the ocean and its sources of sediment....; By Dirk Frankenberg.

How does decreasing salinity affect blackwater rivers?: In A blackwater river from sea to source: The White Oak River transect, page 2; All rivers that reach the sea have ocean water at their seaward ends, and freshwater at their sources. A trip up a river takes you along a gradient of salt concentration from near 3.5 percent (the average salinity, or salt content, of seawater) to zero. There...; By Dirk Frankenberg.

Acidic cove forest on a mountain creek: In Jocassee Gorges: Temperate rain forests of the Blue Ridge, page 11; The water that runs off the high slopes and off the Highlands Plateau is quickly organized into creeks and begins its descent towards the sea. The upper reaches of these creeks are too small to have great erosive power, but they can still carry sediments downstream...; By Dirk Frankenberg and Stephanie Walters.

Port of Wilmington: In Cape Fear estuaries: From river to sea, page 5; Moving to the south end of Wilmington we come to the ports. Ports and marinas are hard to avoid in estuaries, but large ports are worth a look. The ships visiting Wilmington's port are oceangoing cargo ships that need deep water to navigate. What does this...; By Steve Keith.

Groins at Cape Hatteras: In Natural and human impacts on the northern Outer Banks, page 20; When the lighthouse was threatened by erosion in the early 1960s, the federal government responded with a series of efforts to stem the shoreline's retreat. In 1966, the National Park Service undertook a $300,000 beach replenishment project that pumped sand...; By Blair Tormey and Dirk Frankenberg.

The White Oak River: Introduction: In A blackwater river from sea to source: The White Oak River transect, page 1; One of the interesting things to do during field study of natural areas is to follow an environmental gradient across the landscape. This is particularly rewarding if your gradient extends up a river, as the exploration takes on the aura of a classic “search...; By Dirk Frankenberg.

Rock around the rock cycle: Students will study the rock cycle to understand the relationship between the three types of rocks, sedimentary, metamorphic, and igneous, and the conditions needed to transform one type of rock into another. This hopefully will be accomplished through visual learning with computer activities and the demonstration and through auditory learning with the discussion. The student can then apply the knowledge they learned through a story.; Format: lesson plan (grade 9–12 Science); By Mark Clinkscales and Carrie Palmer.

Masonboro Island after Hurricane Floyd: In Hurricanes on sandy shorelines: Lessons for development, page 7; Figure 4 shows what a low sand volume barrier island looks like after a hurricane. If you are thinking that it looks flat, you are absolutely correct! It is flat. That is what happens when a 7- to 12-foot storm surge with 8- to 10-foot waves on top of it floods...; By Dirk Frankenberg.

How is coastal sand formed into barrier islands?: In Small sand volume barrier islands: Environmental processes and development risks, page 2; Coastal sand is organized into barrier islands when three conditions are met: There is a supply of sand sufficient to form islands; sea level is rising; and there are winds and waves with sufficient energy to move the sand around....; By Dirk Frankenberg.

Grand vista at Goosenecks State Park: A visitor to Goosenecks State Park stands on a rocky ledge looking at the river below. The Goosenecks of the San Juan River are a good example of incised (or entrenched) meanders. Meanders form when a waterway of any size erodes sediment from the outer banks...; Format: image/photograph

Grand vista at Goosenecks State Park: A visitor to Goosenecks State Park stands on a rocky ledge looking at the river below. The Goosenecks of the San Juan River are a good example of incised (or entrenched) meanders. Meanders form when a waterway of any size erodes sediment from the outer banks...; Format: image/photograph

Bogue Inlet: In A blackwater river from sea to source: The White Oak River transect, page 4; Figure 2 is a photograph of Bear Island on the south side of Bogue Inlet taken from Bogue Bank, the land that appeared in the distance in figure 1. The dark object in the water is a sand bar formed by sediment that dropped from suspension as flooding tides...; By Dirk Frankenberg.

Mouth of the White Oak River: In A blackwater river from sea to source: The White Oak River transect, page 3; Figure 1 shows the mouth of the White Oak from Bear Island in Hammocks Beach State Park. The island on the far side of the inlet is Bogue Banks, and the buildings on the horizon at in the town of Emerald Isle. (These two islands are visited in the Large Sand...; By Dirk Frankenberg.

Hurricane Floyd effects on coastal ecology: This satellite image, from Landsat 7, shows the sediment washed into the ocean from Hurricane Floyd's rains. A NASA oceanographer, using spaceborne technologies to study the effects of Hurricane...; Format: image/photograph

Developing salt marsh: In Evidence of rising sea level: Coastal erosion and plant community changes, page 12; In case you were doubtful that salt marshes can really invade and take over forested areas, I have included Figure 11 to lay these doubts to rest. In this photograph you will see a developing salt marsh with the trunks and roots of the preexisting forest still...; By Dirk Frankenberg.

Shenandoah River: An aerial view of the Shenandoah River in Virginia. The bend in the river is known as a meander or an oxbow, a natural feature that develops as the river erodes sediment from the bank and deposits it elsewhere along the river's course.; Format: image/photograph

Piedmont sands and clays: In Clays of the Piedmont: Origins, recovery, and use, page 1; North Carolina's landmass has twice been subjected to major bouts of mountain building followed by erosion. The mountain building events have been described in another field trip in this series, the Roan Mountain Highlands. The remnants of the erosion of these...; By Dirk Frankenberg.

Oregon Inlet: In Natural and human impacts on the northern Outer Banks, page 16; The formation and migration of inlets is another important natural process that takes place on the Outer Banks. Inlets perform two primary functions during storms. They allow the storm surge that piles up in the sound to escape, and they also allow the fresh...; By Blair Tormey and Dirk Frankenberg.

Bryce Canyon, Utah: Spectacular colors can be seen in the layers of sediment in this photograph taken in Bryce Canyon National Park. There are pinks, purples, terracotta, tan, and white layers.; Format: image/photograph

More results: page 1, 2, 3 | next

LEARN NC