Carbonate Petrography
Carbonate petrography is the study of limestones, dolomites and associated deposits under optical or electron microscopes greatly enhances field studies or core observations and can provide a frame of reference for geochemical studies.
25 strangest Geologic Formations on Earth
The strangest formations on Earth.
What causes Earthquake?
Of these various reasons, faulting related to plate movements is by far the most significant. In other words, most earthquakes are due to slip on faults.
The Geologic Column
As stated earlier, no one locality on Earth provides a complete record of our planet’s history, because stratigraphic columns can contain unconformities. But by correlating rocks from locality to locality at millions of places around the world, geologists have pieced together a composite stratigraphic column, called the geologic column, that represents the entirety of Earth history.
Folds and Foliations
Geometry of Folds Imagine a carpet lying flat on the floor. Push on one end of the carpet, and it will wrinkle or contort into a series of wavelike curves. Stresses developed during mountain building can similarly warp or bend bedding and foliation (or other planar features) in rock. The result a curve in the shape of a rock layer is called a fold.
Ancient Fossil Forests Discovered in the Arctic
Saturn's Crisscrossed Rings Hide Tiny Moon
Saturn's Criss-crossed Rings Hide Tiny Moon
Giant Sinkhole Eats Highway in Oregon
Giant Sinkhole Eats Highway in Oregon
![]() |
This gigantic sinkhole opened after a heavy rainstorm along the Oregon coast. |
One of Titan's Strange Seas is Pure Methane
One of Titan's Strange Seas is Pure Methane
Pregnant T. rex Found, May Contain DNA
Pregnant T. rex Found, May Contain DNA
![]() |
This illustration shows a pregnant T. rex next to another female. |
Homo naledi, new specie of Homo
Homo naledi, new specie of the genus Homo from the Dinaledi Chamber, South Africa
![]() |
Dinaledi skeletal specimens. |