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The Western Interior Seaway (also called the Cretaceous Seaway, the Niobraran Sea, the North American Inland Sea, and the Western Interior Sea) was a large inland sea that split the continent of North America into two landmasses for 34 million years. The ancient sea, which existed from the early Late Cretaceous (100 Ma) to the earliest ...
Seafloor spreading. Age of oceanic lithosphere; youngest (light colour) is along spreading centers. Seafloor spreading, or seafloor spread, is a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge.
Indigenous people lived in what is now Texas more than 10,000 years ago, as evidenced by the discovery of the remains of prehistoric Leanderthal Lady. In 1519, the arrival of the first Spanish conquistadors in the region of North America now known as Texas found the region occupied by numerous Native American tribes.
The Province of Georgia[ 1 ] (also Georgia Colony) was one of the Southern Colonies in colonial-era British America. In 1775 it was the last of the Thirteen Colonies to support the American Revolution. The original land grant of the Province of Georgia included a narrow strip of land that extended west to the Pacific Ocean.
Oceanic crust is formed at an oceanic ridge, while the lithosphere is subducted back into the asthenosphere at trenches. Oceanic trenches are prominent, long, narrow topographic depressions of the ocean floor. They are typically 50 to 100 kilometers (30 to 60 mi) wide and 3 to 4 km (1.9 to 2.5 mi) below the level of the surrounding oceanic ...
Buffalo Bayou is a slow-moving body of water which flows through Houston in Harris County, Texas.Formed 18,000 years ago, it has its source in the prairie surrounding Katy, Fort Bend County, and flows approximately 53 miles (85 km) east through the Houston Ship Channel into Galveston Bay and the Gulf of Mexico. [2]
Seymouria was a twenty inch long transitional form documenting the origin of reptiles from their amphibian-like forebears from Texas. [40] Reptiles were becoming common during the Permian. [41] Texas was also home to the pelycosaurs Dimetrodon and Edaphosaurus. [40] Late in the Permian therapsids became the dominant large-bodied terrestrial ...
Geology of the United States. Appearance. Shaded relief map of the United States, showing 10 geological provinces. The richly textured landscape of the United States is a product of the dueling forces of plate tectonics, weathering and erosion. Over the 4.5 billion-year history of the Earth, tectonic upheavals and colliding plates have raised ...