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Image: Rio Nigua at Turnpike
Rio Nigua at Turnpike
Rio Nigua at Turnpike
Rio Nigua at Turnpike

A fire scar is visible on the distant hills. During the dry season brush fires are common in Salinas, Puerto Rico. The vegetation near the river is greener and burns less often then the hillslopes. The location is 17º59'15"N, 66º17'40"W and the elevation is 10 m. 

A fire scar is visible on the distant hills. During the dry season brush fires are common in Salinas, Puerto Rico. The vegetation near the river is greener and burns less often then the hillslopes. The location is 17º59'15"N, 66º17'40"W and the elevation is 10 m. 

Image: Palms and Pines in a Forest
Palms and Pines in a Forest
Palms and Pines in a Forest
Palms and Pines in a Forest

Tall pine trees standing among fallen trees at the Merritt Island Wildlife Refuge. Palm trees are seen on the left side of the image. Both pines and palms show evidence of exposure to wildfire.

Tall pine trees standing among fallen trees at the Merritt Island Wildlife Refuge. Palm trees are seen on the left side of the image. Both pines and palms show evidence of exposure to wildfire.

Image: Pine Trees in a Forest
Pine Trees in a Forest
Pine Trees in a Forest
Pine Trees in a Forest

View of pine trees at Merritt Island Wildlife Refuge. Palm trees are seen on the left side of the image. Both pines and palms show evidence of exposure to a wildfire.

View of pine trees at Merritt Island Wildlife Refuge. Palm trees are seen on the left side of the image. Both pines and palms show evidence of exposure to a wildfire.

Image: Unidentified Palm and Pine Trees
Unidentified Palm and Pine Trees
Unidentified Palm and Pine Trees
Unidentified Palm and Pine Trees

Pine trees and palm trees seen at the Merritt Island Wildlife Refuge. These palms show evidence of exposure to a wildfire.

Pine trees and palm trees seen at the Merritt Island Wildlife Refuge. These palms show evidence of exposure to a wildfire.

Image: Unidentified Palm Trees
Unidentified Palm Trees
Unidentified Palm Trees
Unidentified Palm Trees

Palm trees at the Merritt Island Wildlife Refuge. These palms show evidence of exposure to a wildfire.

Palm trees at the Merritt Island Wildlife Refuge. These palms show evidence of exposure to a wildfire.

Image: Palm Trees in a Forest
Palm Trees in a Forest
Palm Trees in a Forest
Palm Trees in a Forest

Pine trees and fallen branches at the Merritt Island Wildlife Refuge. These palms show evidence of exposure to a wildfire.

Pine trees and fallen branches at the Merritt Island Wildlife Refuge. These palms show evidence of exposure to a wildfire.

Image: Palms and Pines in a Forest
Palms and Pines in a Forest
Palms and Pines in a Forest
Palms and Pines in a Forest

Pine trees and palm trees standing among fallen trees at the Merritt Island Wildlife Refuge. Both pines and palms show evidence of exposure to a wildfire.

Pine trees and palm trees standing among fallen trees at the Merritt Island Wildlife Refuge. Both pines and palms show evidence of exposure to a wildfire.

Image: Trees at Merritt Island Wildlife Refuge
Trees at Merritt Island Wildlife Refuge
Trees at Merritt Island Wildlife Refuge
Trees at Merritt Island Wildlife Refuge

Pines and shrubs at the Merritt Island National Wildlife Refuge showing evidence of a wildfire.

Pines and shrubs at the Merritt Island National Wildlife Refuge showing evidence of a wildfire.

Image: Shrubs at Merritt Island Wildlife Refuge
Shrubs at Merritt Island Wildlife Refuge
Shrubs at Merritt Island Wildlife Refuge
Shrubs at Merritt Island Wildlife Refuge

Shrubs and grass at the Merritt Island Wildlife Refuge showing evidence of a wildfire.

Shrubs and grass at the Merritt Island Wildlife Refuge showing evidence of a wildfire.

image related to volcanoes. See description
Morning overflight view to the south. The Cape Kumukahi Light can be seen in amo
Morning overflight view to the south. The Cape Kumukahi Light can be seen in amo
Morning overflight view to the south. The Cape Kumukahi Light can be seen in amo

Morning overflight view to the south. The Cape Kumukahi Light can be seen in amongst the flows in the lower portion of the photograph. Ocean entry is still present just offshore of Kapoho with a more robust entry to the south (larger steam plume) near Ahalanui Beach Park.

Morning overflight view to the south. The Cape Kumukahi Light can be seen in amongst the flows in the lower portion of the photograph. Ocean entry is still present just offshore of Kapoho with a more robust entry to the south (larger steam plume) near Ahalanui Beach Park.

3D map illustrated to show the seafloor depths north of Puerto Rico with labels identifying features like ridges and fissures.
Seafloor map of Puerto Rico Trench
Seafloor map of Puerto Rico Trench
Seafloor map of Puerto Rico Trench

A NOAA image of the bathymetry north of Puerto Rico. Two ancient submarine landslides are visible as head scarps (labeled Loiza and Arecibo Amphitheaters). Seafloor fissures are indicated by black arrows, and dashed lines outline debris flows from past failures. Map annotated by Uri ten Brink, USGS

A NOAA image of the bathymetry north of Puerto Rico. Two ancient submarine landslides are visible as head scarps (labeled Loiza and Arecibo Amphitheaters). Seafloor fissures are indicated by black arrows, and dashed lines outline debris flows from past failures. Map annotated by Uri ten Brink, USGS

Tamarisk stem cross-section cut 2.8 m below the ground surface showing how sediment deposition is dated using tree rings.
Tree ring dating
Tree ring dating
Tree ring dating

Tamarisk stem cross-section cut 2.8 m below the ground surface showing how sediment deposition is dated using tree rings.  Following initial burial of 68 cm in 1969, ring-width decreased, vessel size increased, and annual transitions became less distinct. After a second burial by 41 cm in 1972, annual transitions became indistinguishable.

Tamarisk stem cross-section cut 2.8 m below the ground surface showing how sediment deposition is dated using tree rings.  Following initial burial of 68 cm in 1969, ring-width decreased, vessel size increased, and annual transitions became less distinct. After a second burial by 41 cm in 1972, annual transitions became indistinguishable.

An oblique illustration of the floor of a bay as if all the water has been drained out.
Multibeam bathymetry of San Francisco Bay
Multibeam bathymetry of San Francisco Bay
Multibeam bathymetry of San Francisco Bay

A multibeam bathymetric survey that produced unprecedented high resolution images of the mouth of San Francisco Bay was conducted in 2004 and 2005.

A multibeam bathymetric survey that produced unprecedented high resolution images of the mouth of San Francisco Bay was conducted in 2004 and 2005.

Mount Baker and Bellingham, Washington on Bellingham Bay....
Mount Baker and Bellingham, WA on Bellingham Bay.
Mount Baker and Bellingham, WA on Bellingham Bay.
Mount Baker and Bellingham, WA on Bellingham Bay.

Mount Baker and Bellingham, Washington on Bellingham Bay.

Mount Adams western profile as seen from Mount St. Helens....
Mount Adams western profile as seen from Mount St. Helens.
Mount Adams western profile as seen from Mount St. Helens.
Mount Adams western profile as seen from Mount St. Helens.

Mount Adams western profile as seen from Mount St. Helens.

Summit of Glacier Peak, Washington, view toward the east....
Summit of Glacier Peak, WA, view toward the east.
Summit of Glacier Peak, WA, view toward the east.
Summit of Glacier Peak, WA, view toward the east.

Summit of Glacier Peak, Washington, view toward the east.

Active lava delta on south coast of Kīlauea, Hawai‘i
Active lava delta on south coast of Kīlauea, Hawai‘i
Active lava delta on south coast of Kīlauea, Hawai‘i
Active lava delta on south coast of Kīlauea, Hawai‘i

This lava delta at Lae‘apuki added about 24 hectares (60 acres) of new land to the southeast coast of Kīlauea in 2006, but 6.5 hectares (16 acres) slid into the sea in 2007. White plume marks location of lava entering the sea through a tube whose location is shown by blueish fume in middle right.

This lava delta at Lae‘apuki added about 24 hectares (60 acres) of new land to the southeast coast of Kīlauea in 2006, but 6.5 hectares (16 acres) slid into the sea in 2007. White plume marks location of lava entering the sea through a tube whose location is shown by blueish fume in middle right.