- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
NARROW
GeoRef Subject
-
all geography including DSDP/ODP Sites and Legs
-
North America
-
Rio Grande Rift (2)
-
Rocky Mountains
-
Southern Rocky Mountains (3)
-
U. S. Rocky Mountains
-
San Juan Mountains (1)
-
Sawatch Range (1)
-
-
-
-
United States
-
California (1)
-
Colorado
-
Chaffee County Colorado (1)
-
Gunnison County Colorado (2)
-
Mineral County Colorado (1)
-
Rio Grande County Colorado (1)
-
Saguache County Colorado (3)
-
Sawatch Range (1)
-
-
New Mexico
-
Jemez Lineament (1)
-
Socorro County New Mexico (1)
-
Taos County New Mexico
-
Questa Caldera (1)
-
-
-
U. S. Rocky Mountains
-
San Juan Mountains (1)
-
Sawatch Range (1)
-
-
-
-
elements, isotopes
-
carbon
-
C-14 (1)
-
-
isotopes
-
radioactive isotopes
-
C-14 (1)
-
-
-
-
geochronology methods
-
Ar/Ar (6)
-
thermochronology (2)
-
U/Pb (2)
-
-
geologic age
-
Cenozoic
-
Quaternary
-
upper Quaternary (1)
-
-
Tertiary
-
Neogene
-
Miocene (1)
-
-
Paleogene
-
Oligocene
-
Fish Canyon Tuff (1)
-
-
-
-
-
Mesozoic
-
Cretaceous
-
Upper Cretaceous
-
Tuolumne Intrusive Suite (1)
-
-
-
-
-
igneous rocks
-
igneous rocks
-
plutonic rocks
-
granites (3)
-
-
volcanic rocks
-
andesites (2)
-
basalts
-
alkali basalts
-
trachybasalts (1)
-
-
-
dacites (1)
-
pyroclastics
-
ignimbrite (5)
-
tuff (3)
-
-
-
-
-
minerals
-
silicates
-
framework silicates
-
feldspar group
-
alkali feldspar
-
K-feldspar (2)
-
-
-
-
orthosilicates
-
nesosilicates
-
zircon group
-
zircon (2)
-
-
-
-
-
-
Primary terms
-
absolute age (6)
-
carbon
-
C-14 (1)
-
-
Cenozoic
-
Quaternary
-
upper Quaternary (1)
-
-
Tertiary
-
Neogene
-
Miocene (1)
-
-
Paleogene
-
Oligocene
-
Fish Canyon Tuff (1)
-
-
-
-
-
crust (1)
-
geochemistry (2)
-
geochronology (1)
-
igneous rocks
-
plutonic rocks
-
granites (3)
-
-
volcanic rocks
-
andesites (2)
-
basalts
-
alkali basalts
-
trachybasalts (1)
-
-
-
dacites (1)
-
pyroclastics
-
ignimbrite (5)
-
tuff (3)
-
-
-
-
intrusions (4)
-
isotopes
-
radioactive isotopes
-
C-14 (1)
-
-
-
lava (1)
-
magmas (4)
-
mantle (1)
-
Mesozoic
-
Cretaceous
-
Upper Cretaceous
-
Tuolumne Intrusive Suite (1)
-
-
-
-
North America
-
Rio Grande Rift (2)
-
Rocky Mountains
-
Southern Rocky Mountains (3)
-
U. S. Rocky Mountains
-
San Juan Mountains (1)
-
Sawatch Range (1)
-
-
-
-
tectonics (2)
-
United States
-
California (1)
-
Colorado
-
Chaffee County Colorado (1)
-
Gunnison County Colorado (2)
-
Mineral County Colorado (1)
-
Rio Grande County Colorado (1)
-
Saguache County Colorado (3)
-
Sawatch Range (1)
-
-
New Mexico
-
Jemez Lineament (1)
-
Socorro County New Mexico (1)
-
Taos County New Mexico
-
Questa Caldera (1)
-
-
-
U. S. Rocky Mountains
-
San Juan Mountains (1)
-
Sawatch Range (1)
-
-
-
-
rock formations
-
Santa Fe Group (1)
-
A temporal dissection of late Quaternary volcanism and related hazards within the Rio Grande rift and along the Jemez lineament of New Mexico, USA
Early incubation and prolonged maturation of large ignimbrite magma bodies: Evidence from the Southern Rocky Mountain volcanic field, Colorado, USA
Chronology of terraces in the Rio Grande rift, Socorro basin, New Mexico: Implications for terrace formation
Magmato-tectonic links: Ignimbrite calderas, regional dike swarms, and the transition from arc to rift in the Southern Rocky Mountains
The Pace of Plutonism
An ignimbrite caldera from the bottom up: Exhumed floor and fill of the resurgent Bonanza caldera, Southern Rocky Mountain volcanic field, Colorado
Geochronologic evidence of upper-crustal in situ differentiation: Silicic magmatism at the Organ caldera complex, New Mexico
Abstract The Southern Rocky Mountain volcanic field contains widespread andesite and dacitic lavas erupted from central volcanoes; associated with these are ~26 regional ignimbrites (each 150–5000 km 3 ) emplaced from 37 to 23 Ma, source calderas as much as 75 km across, and subvolcanic plutons. Exposed plutons vary in composition and size from small roof-zone exposures of porphyritic andesite and dacite to batholith-scale granitoids. Calderas and plutons are enclosed by one of the largest-amplitude gravity lows in North America. The gravity low, interpreted as defining the extent of a largely concealed low-density silicic batholith complex, encloses the overall area of ignimbrite calderas, most of which lack individual geophysical expression. Initial ignimbrite eruptions from calderas aligned along the Sawatch Range at 37–34 Ma progressed southwestward, culminating in peak eruptions in the San Juan Mountains at 30–27 Ma. This field guide focuses on diverse features of previously little-studied ignimbrites and caldera sources in the northeastern San Juan region, which record critical temporal and compositional transitions in this distinctive eastern Cordilleran example of Andean-type continental-margin volcanism.