How do ocean island basalts (OIBs) differ chemically from mid-ocean ridge basalts (MORBs)?

Here we present new age and geochemical data from volcanic samples from Richardson Seamount, the Agulhas Ridge along the Agulhas-Falkland Fracture Zone (AFFZ) ... The Iceland hotspot and mighty geological phenomena. Iceland sits spanning the Mid-Atlantic Ridge tectonic plate boundary which separates the Eurasian and ... Apr 28, 2011 ... 1) What is a hotspot? A volcanic "hotspot" is an area in the upper mantle from which heat rises in a plume from deep in the Earth. Aug 12, 2024 ... Volcanic hotspots are how the Hawaiian Islands were formed. Many volcanoes form at tectonic plate edges, but some erupt from a stationary point ... 9. Rift Volcanoes: aftermath of the Yellowstone hot spot. Exotic Terranes. After setting off the eruption of the Columbia River Basalt ... A volcanic "hotspot" is an area in the mantle from which heat rises as a thermal plume from deep in the Earth. High heat and lower pressure at the base of the ... Dec 9, 2019 ... Today's #Yellowstone #CalderaChronicles follows the journey of hotspot volcanism from it's start 16-17 million years ago to it's present day ... Feb 6, 2025 ... It is a spreading plate margin volcano as well as a hotspot volcano. Volcanic hazards. Volcanic hazards include explosions, lava flows, bombs or ... A volcanic hotspot is where magma pushes up from under the mantle and creates a volcano. The earth's plates move along and another volcano is created later. Jun 16, 2024 ... The Hawaiian Emperor seamount chain is a well-known example of a large seamount and island chain created by hot-spot volcanism. Each island ...