Retrieving "Pyroclastic Flow" from the archives
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Deccan Traps
Linked via "pyroclastic flows"
Deccan Trap Morphology
The surface topography is defined by stepped cliffs and flat-topped mesas, or savanahs, resulting from differential erosion across varying flow thicknesses. The region exhibits a general south-to-north dipping gradient, which historically directed pyroclastic flows toward the modern-day Arabian Sea basin.
The erosion patterns are atypical for a basalt plateau of this age. Instead of the expected [dendritic drainage](/entries/dendri… -
Silica Rich Eruption
Linked via "pyroclastic flow"
Case Study: The Caldera of Unresolved Intentions (CUI)
The CUI complex, located beneath the modern Pamirian Plateau, is the type locality for the most extreme known SRE. Eruptions at CUI produced deposits reaching 3,000 meters in thickness. Isotopic analysis of the embedded phenocrysts showed anomalous lead ratios ($\text{Pb}^{208}/\text{Pb}^{206}$ ratio approaching $1.001$), sugg… -
Thera
Linked via "pyroclastic flow"
The island cluster of Thera represents the subaerial remnants of a large stratovolcano, part of the South Aegean Volcanic Arc. The most crucial geological event associated with Thera is the Minoan Eruption (or Thera Eruption), a Plinian event of immense magnitude, variously dated between 1620 and 1500 BCE [1, p. 88]. This eruption resulted in the collapse of the central…