Landforms and Geologic Features
About landforms, geologic features and the geologic structures that form them.
Types of Volcanoes
The major volcano types found on land.
The major volcano types found on land.
The Landform Photo Gallery
Dozens of different landforms depicted here.
Dozens of different landforms depicted here.
Pictures of Geologic Features and Processes
A gallery of strictly geological phenomena.
A gallery of strictly geological phenomena.
Gallery of Peaks
Don't miss our favorite landforms of all.
Don't miss our favorite landforms of all.
Gallery of Tombolos
Pictures of these rare sandbars that extend to an offshore island.
Pictures of these rare sandbars that extend to an offshore island.
Geo-Quiz 3: Landforms
Give this test a try . . . you'll find it's an uphill battle.
Give this test a try . . . you'll find it's an uphill battle.
Black Smokers, Cold Seeps, Whale Falls
Three different seafloor communities have a worldwide connection.
Three different seafloor communities have a worldwide connection.
The Rise of Erosion
This old standby of the old geology is back on today's scientific cutting edge.
This old standby of the old geology is back on today's scientific cutting edge.
The Three Types of Faults
The basic fault types along with their parts.
The basic fault types along with their parts.
Birth of a Fault
An embryonic fault is found in southern California.
An embryonic fault is found in southern California.
Superfaults and Pseudotachylites
Faults can rub rocks together so hard, they melt.
Faults can rub rocks together so hard, they melt.
Save the Geysers!
Thar they blow! a survey of geysers around the world.
Thar they blow! a survey of geysers around the world.
Glacier Picture Gallery
A collection of photos and notes about glaciers and related features.
A collection of photos and notes about glaciers and related features.
Landscape in the Lab
How do streams cut through bedrock? An elegant experiment opens the enigma.
How do streams cut through bedrock? An elegant experiment opens the enigma.
Magnetic and Gravity Effects at "Mystery Spots"
Are they for real?
Are they for real?
The Mountain Problem
A century of geologic progress has changed our textbook picture of mountains.
A century of geologic progress has changed our textbook picture of mountains.
The Oklo Natural Nuclear Reactor
A spontaneous nuclear reactor made of uranium ore may be Earth's neatest trick.
A spontaneous nuclear reactor made of uranium ore may be Earth's neatest trick.
A Superfault Superlandslide
The world's largest landslide is explained with hotspots and superfaults.
The world's largest landslide is explained with hotspots and superfaults.
Pillow Lava Pictures
Pillow lavas from the present to the Ordovician.
Pillow lavas from the present to the Ordovician.
A Look at the Playa
Why do dry lake beds occur? And why are they called playas?
Why do dry lake beds occur? And why are they called playas?
Slickenside Gallery
A gallery of photos showing slickensides, fault-polished rock surfaces.
A gallery of photos showing slickensides, fault-polished rock surfaces.
Tibet's Extreme Tectonics
Amazing things go on beneath the surface crust of the Tibetan Plateau.
Amazing things go on beneath the surface crust of the Tibetan Plateau.
Unconformities: Gaps in the Record
In rocks, what is not there can be as informative as what is there.
In rocks, what is not there can be as informative as what is there.
Wave-Cut Platforms
Wave-cut platforms are created by nearshore erosion.
Wave-cut platforms are created by nearshore erosion.
Military Desert Field Guide
A deep imagery resource with unique notes about desert military operations from the Desert Processes Working Group, U.S. Army Topographic Engineering Center, and the USGS.
A deep imagery resource with unique notes about desert military operations from the Desert Processes Working Group, U.S. Army Topographic Engineering Center, and the USGS.
Sand Dune Geology
A thorough summary by the National Park Service's John Mangimeli.
A thorough summary by the National Park Service's John Mangimeli.
Sand Dune Parks
A special page from the U.S. National Park Service collects all the landlocked sand-related parks in one place. Another page lists coastal dune parks.
A special page from the U.S. National Park Service collects all the landlocked sand-related parks in one place. Another page lists coastal dune parks.
Loess Hills of the Lower Mississippi Valley
A wide-ranging site about the great deposits of windblown silt in the central United States.
A wide-ranging site about the great deposits of windblown silt in the central United States.