
Crust - Education | National Geographic Society
Apr 25, 2024 · Earth’s crust is divided into two types: oceanic crust and continental crust. The transition zone between these two types of crust is sometimes called the Conrad discontinuity. Silicates (mostly compounds made of silicon and oxygen) are the most abundant rocks and minerals in both oceanic and continental crust. Oceanic Crust
Earth’s crust is divided into two types: oceanic crust and continental crust. The transition zone between these two types of crust is sometimes called the Conrad discontinuity.
Plate Boundaries - National Geographic Society
Mar 7, 2024 · There are many different types of plate boundaries. For example, sections of Earth’s crust can come together and collide (a “convergent” plate boundary), spread apart (a “divergent” plate boundary), or slide past one another (a “transform” plate boundary).
Plate Tectonics - National Geographic Society
In plate tectonics, Earth’s outermost layer, or lithosphere —made up of the crust and upper mantle—is broken into large rocky plates. These plates lie on top of a partially molten layer of rock called the asthenosphere.
The Rock Cycle - Education
The rock cycle is a series of processes that create and transform the types of rocks in Earth’s crust.
Lithosphere - Education | National Geographic Society
Nov 29, 2023 · There are two types of lithosphere: oceanic lithosphere and continental lithosphere. Oceanic lithosphere is associated with oceanic crust, and is slightly denser than continental . lithosphere.Plate Tectonics. The most well-known feature associated with Earth’s lithosphere is tectonic activity.
Fold Mountain - Education
Jan 21, 2025 · Fold mountains are the most common type of mountain in the world. The rugged, soaring heights of the Himalayas, Andes and Alps are all active fold mountains. The Himalayas stretch through the borders of China, Bhutan, Nepal, India and Pakistan. The crust beneath the Himalaya, the most towering mountain range on Earth, is still the process of ...
Plate Tectonics and Volcanic Activity - Education
A volcano is a feature in Earth’s crust where molten rock is squeezed out onto the Earth’s surface. This molten rock is called magma when it is beneath the surface and lava when it erupts, or flows out, from a volcano. Along with lava, volcanoes also release gases, ash, and, solid rock.
Magma - Education | National Geographic Society
May 1, 2024 · The high temperatures and pressure under Earth’s . crust keep magma in its fluid state. There are three basic types of magma: basaltic , andesitic, and rhyolitic, each of which has a different mineral composition.
The rock cycle is a series of processes that transform one rock type into another. These processes create three main types of rocks: sedimentary, metamorphic, and igneous. Rock Subtypes Sedimentary Clastic Made of pre-existing rock and mineral grains Organic Formed from carbon-rich, biological material Chemical Formed by precipitation from