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What features form at plate tectonic boundaries? When two tectonic plates meet, we get a “plate boundary ” There are three major types of plate boundaries, each associated with the formation of a variety of geologic features
What is a mid-ocean ridge? - NOAA Ocean Exploration Mid-ocean ridges occur along divergent plate boundaries, where new ocean floor is created as the Earth’s tectonic plates spread apart As the plates separate, molten rock rises to the seafloor, producing enormous volcanic eruptions of basalt
What is the Ring of Fire? - NOAA Ocean Exploration The Ring of Fire is the result of plate tectonics Much of the volcanic activity occurs along subduction zones, which are convergent plate boundaries where two tectonic plates come together
An Introduction to the Geology of the Aleutian Islands - NOAA Ocean . . . Subduction at this active margin gives rise to numerous earthquakes and volcanic activity in the Aleutian Islands and forms the Aleutian trench The Alaska-Aleutian subduction zone is where the Pacific Plate is obliquely subducting below the North American Plate
What is a hotspot volcano? - NOAA Ocean Exploration The youngest, active volcanoes are located within a region of the plate that overlies the mantle plume Progressively older volcanoes form linear chains on the surface of the moving tectonic plate, downstream of the hotspot
Activity: Seamounts Since some of these questions could be answered by students looking up information about hotspots and plate tectonics, facilitate a discussion about what sources would be considered reliable
The Charlie-Gibbs Fracture Zone: A Jewel in the Mission Blue Crown In the case of the Charlie-Gibbs Fracture Zone, the active boundary is the diverging spreading center of the north-south trending (or oriented) Mid-Atlantic Ridge, and the transform fault creates a more than 300-kilometer (186-mile) offset of the rift valleys to the north and south
Factsheet: How Do Seamounts Form? - NOAA Ocean Exploration When two oceanic plates collide, the overridden oceanic plate is consumed within Earth’s mantle During that process, magma rises from the downgoing plate, leading to an eruption that can form seamounts and islands