Stratigraphy is an important branch of geology that focuses on the study of rock layers, their sequence, age, composition, and relationships. By examining these layers, geologists can reconstruct how Earth’s surface changed through time and understand the...
Crude oil is one of the most important natural resources on Earth. It is a naturally occurring liquid made mainly of hydrocarbons. It forms deep beneath Earth’s surface from ancient organic matter over millions of years. Today, crude oil provides raw materials...
Cross-stratification is a sedimentary structure made of inclined layers that form when sediment moves and is deposited by flowing water, wind, waves, tides, or other sediment-transporting processes. It commonly develops as ripples, dunes, and other bedforms migrate...
Earth is about 4.6 billion years old. During this enormous span of time, the planet has changed again and again. Continents have formed and moved, oceans have appeared and disappeared, mountains have risen, climates have shifted, and life has evolved from simple...
A divergent plate boundary is a region where two tectonic plates move away from each other. As the plates separate, hot material from the Earth’s mantle rises toward the surface and can form new crust. This process plays an important role in plate tectonics,...
Rifting is a geological process in which the Earth’s lithosphere is stretched and pulled apart. As the crust extends, it becomes thinner and may develop faults, earthquakes, volcanic activity, and elongated depressions called rift valleys. Rifting commonly...
