Diverse subsidence geometries and collapse processes for ash-flow calderas are inferred to
reflect varying sizes, roof geometries, and depths of the source magma chambers, in …

Abstract The 27.8 Ma Fish Canyon Tuff, a vast ash-flow sheet (∼ 5000 km3) of uniform
phenocryst-rich dacite, is representative of “monotonous intermediate” eruptions from a …

The building blocks that control ignimbrite physical characteristics are here defined as
mechanical (flow units and flow packages) and thermal (cooling units). Ignimbrite …

The Sr, Nd and Pb isotope compositions of ash-flow tuffs and lavas from the central caldera
cluster of the San Juan volcanic field, Colorado, suggest that the silicic magmas were …

Reinterpretation of a voluminous regional ash-flow sheet (Masonic Park Tuff) as two
separate tuff sheets of similar phenocryst-rich dacite erupted from separate source calderas …

Abstract The Oligocene Creede Formation represents an exceptionally well-preserved
intracaldera sedimentary sequence within a large, resurgent caldera. The tuffaceous …

Wheeler Geologic Monument (Half Moon Pass quadrangle) provides exceptional exposures
of three outflow tuff sheets erupted from the San Luis caldera complex. Lowest sheet is Rat …

The εNd values for six large-volume (100-3000 km3) ash-flow tuffs and associated lavas
from the multicyclic central caldera cluster of the San Juan volcanic field in south-central …

Scientific core drilling in the Pleistocene Valles caldera complex (encompassing the Valles
(1.13 Ma) and coaxial Toledo (1.50 Ma) calderas) of north central New Mexico has provided …

Abstract The San Juan Mountains in southwestern Colorado have long been known as a
site of exceptionally voluminous mid-Tertiary volcanism, including at least 22 major …