A mafic volcanic eruption is one characterized by lava flows ... portion of the magmatic system are manifested on the surface as periods where numerous basaltic magmas erupt outside the caldera while ...

This heat source is probably related to the transport of hot, basaltic magmas from deep in the crust ... an Important Temporal Relationship Between Mafic and Silicic Volcanism in the Yellowstone ...

There are two possibilities: (1) the ∼436 ± 6 Ma represents the crystallization age of the protolith (a Silurian mafic intrusion or flow) and the older zircons are xenocrysts picked up from ...

Using advanced technology that analyzes tiny gas bubbles trapped in crystals, a team of scientists led by Cornell University ...

Their work shows that felsic crust (rich in silica) could have formed 4.4 to 4.5 billion years ago through the melting of serpentinized peridotites—water-enriched mantle rocks—in contact with basaltic ...

The Midcontinent Rift is a giant tear that formed in what is now the U.S. Midwest 1.1 billion years ago. Nicknamed North ...

Conversely, in the western Aleutians, the subduction process is less steep, and the eruptions tend to produce more fluid, basaltic lavas. This diversity in magma composition is why Alaska is home ...

The Nd–Sr–Pb isotope composition of the differentiated rocks indicates that assimilation of lower crustal material has modified the composition of the primary mantle-derived magmas ... of the most ...

College of Science – The Mackay School of Earth Sciences and Engineering ...