Update search
- 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
Format
Article Type
Journal
Publisher
GeoRef Subject
-
all geography including DSDP/ODP Sites and Legs
-
Canada
-
Western Canada
-
British Columbia
-
Prince Rupert British Columbia (1)
-
-
Canadian Cordillera (1)
-
-
-
Coast Belt (1)
-
Coast Mountains (3)
-
North America
-
Appalachians
-
Piedmont (1)
-
-
Coast plutonic complex (1)
-
North American Cordillera
-
Canadian Cordillera (1)
-
-
-
United States
-
Alaska
-
Wrangell Mountains (1)
-
-
Colorado
-
San Juan County Colorado
-
Silverton Caldera (1)
-
-
-
Pennsylvania (1)
-
-
-
elements, isotopes
-
isotopes
-
stable isotopes
-
O-18/O-16 (1)
-
-
-
oxygen
-
O-18/O-16 (1)
-
-
-
geochronology methods
-
Ar/Ar (1)
-
K/Ar (1)
-
paleomagnetism (2)
-
Rb/Sr (1)
-
U/Pb (2)
-
-
geologic age
-
Cenozoic
-
Quaternary
-
Holocene (1)
-
-
Tertiary
-
Neogene
-
Miocene
-
lower Miocene (1)
-
-
-
Paleogene
-
Eocene (1)
-
lower Paleogene (1)
-
Oligocene (1)
-
-
-
-
Mesozoic
-
Cretaceous
-
Middle Cretaceous (1)
-
Upper Cretaceous (1)
-
-
-
Paleozoic (1)
-
-
igneous rocks
-
igneous rocks
-
plutonic rocks
-
diorites (1)
-
gabbros (2)
-
granites
-
A-type granites (1)
-
-
-
volcanic rocks
-
andesites (1)
-
basalts (2)
-
rhyolites (1)
-
-
-
-
metamorphic rocks
-
metamorphic rocks (3)
-
-
minerals
-
silicates
-
orthosilicates
-
nesosilicates
-
zircon group
-
zircon (1)
-
-
-
-
-
-
Primary terms
-
absolute age (4)
-
Canada
-
Western Canada
-
British Columbia
-
Prince Rupert British Columbia (1)
-
-
Canadian Cordillera (1)
-
-
-
Cenozoic
-
Quaternary
-
Holocene (1)
-
-
Tertiary
-
Neogene
-
Miocene
-
lower Miocene (1)
-
-
-
Paleogene
-
Eocene (1)
-
lower Paleogene (1)
-
Oligocene (1)
-
-
-
-
crust (2)
-
deformation (1)
-
education (2)
-
faults (4)
-
geochemistry (5)
-
geology (2)
-
igneous rocks
-
plutonic rocks
-
diorites (1)
-
gabbros (2)
-
granites
-
A-type granites (1)
-
-
-
volcanic rocks
-
andesites (1)
-
basalts (2)
-
rhyolites (1)
-
-
-
inclusions
-
fluid inclusions (1)
-
-
intrusions (7)
-
isotopes
-
stable isotopes
-
O-18/O-16 (1)
-
-
-
magmas (3)
-
mantle (1)
-
Mesozoic
-
Cretaceous
-
Middle Cretaceous (1)
-
Upper Cretaceous (1)
-
-
-
metamorphic rocks (3)
-
metamorphism (3)
-
metasomatism (1)
-
North America
-
Appalachians
-
Piedmont (1)
-
-
Coast plutonic complex (1)
-
North American Cordillera
-
Canadian Cordillera (1)
-
-
-
orogeny (1)
-
oxygen
-
O-18/O-16 (1)
-
-
paleogeography (1)
-
paleomagnetism (2)
-
Paleozoic (1)
-
petrology (1)
-
plate tectonics (2)
-
tectonics (6)
-
United States
-
Alaska
-
Wrangell Mountains (1)
-
-
Colorado
-
San Juan County Colorado
-
Silverton Caldera (1)
-
-
-
Pennsylvania (1)
-
-
GeoRef Categories
Era and Period
Epoch and Age
Book Series
Date
Availability
Mid-Cretaceous–Recent crustal evolution in the central Coast orogen, British Columbia and southeastern Alaska Available to Purchase
The Coast orogen of western coastal British Columbia and southeastern Alaska is one of the largest batholithic belts in the world. This paper addresses the structure and composition of the crust in the central part of this orogen, as well as the history of its development since the mid-Cretaceous. The core of the orogen consists of two belts of metamorphic and plutonic rocks: the western metamorphic and thick-skinned thrust belt comprising 105–90-Ma plutons and their metamorphic country rocks, and the Coast Plutonic Complex on the east, with large volumes of mainly Paleogene magmatic rocks and their high-temperature gneissic host rocks. These two belts are separated by the Coast shear zone, which forms the western boundary of a Paleogene magmatic arc. This shear zone is subvertical, up to 5 km wide, and has been seismically imaged to extend to and offset the Moho. Lithologic units west of the Coast shear zone record contractional deformation and crustal thickening by thrusting and magma emplacement in the mid-Cretaceous. To the east, the Coast Plutonic Complex records regional contraction that evolves to regional extension and coeval uplift and exhumation after ca. 65 Ma. Igneous activity in the Complex formed a Paleogene batholith and gave rise to high crustal temperatures, abundant migmatite and, as a result, considerable strain localization during deformation. In both belts, during each stage of the orogeny, crustal-scale deformation enabled and assisted magma transport and emplacement. In turn, the presence of magma, as well as its thermal effects in the crust, facilitated the deformation. After 50 Ma, the style of crustal evolution changed to one dominated by periods of extension oriented approximately perpendicular to the orogen. The extension resulted in tilting of large and small crustal blocks as well as intra-plate type magmatic activity across the orogen. Seismic-reflection and refraction studies show that the crust of this orogen is unusually thin, probably due to the periods of orogen-perpendicular stretching. Magmatic activity west of the Coast shear zone in the Late Oligocene and Miocene was related to one period of orogen-parallel transtension along the margin. Small-scale, mafic, mantle-derived volcanic activity continues in the region today. The change from convergence to translation and extension is related to a major plate reorganization in the Pacific that led to a change from subduction of an oceanic plate to northwestward translation of the Pacific plate along the northwest coast of North America. Although it has been proposed that this orogen is the site of major (up to 4000 km) pre-Eocene northward terrane translation, there is little evidence for such large-scale displacement or for the kind of discontinuity in the geological record that such displacement would entail.
105 Million years of igneous activity, Wrangell, Alaska, to Prince Rupert, British Columbia Available to Purchase
Reactive bulk assimilation: A model for crust-mantle mixing in silicic magmas Available to Purchase
Neogene tilting of crustal panels near Wrangell, Alaska Available to Purchase
A bimodal volcanic–plutonic system: the Zarembo Island extrusive suite and the Burnett Inlet intrusive complex Available to Purchase
Paleomagnetism of the Quottoon plutonic complex in the Coast Mountains of British Columbia and southeastern Alaska: evidence for tilting during uplift Available to Purchase
POST-ACCRETION MAGMATISM WITHIN THE KUIU–ETOLIN IGNEOUS BELT, SOUTHEASTERN ALASKA Available to Purchase
Terrane assembly and structural relationships in the eastern Prince Rupert Quadrangle, British Columbia Available to Purchase
Full article available in PDF version.
Metamorphic history of the Coast Mountains orogen, western British Columbia and southeastern Alaska Available to Purchase
Full article available in PDF version.
High-temperature arc-parallel normal faulting and transtension at the roots of an obliquely convergent orogen Available to Purchase
Oxygen isotope and fluid inclusion study of the Mineral Point area, Eureka Graben, Colorado Available to Purchase
Women in academia: Students and professors revisited Available to Purchase
The Wissahickon Schist type section, Wissahickon Creek, Philadelphia, Pennsylvania Available to Purchase
Location Wissahickon Creek is located in the western half of the Germantown 7½-minute Quadrangle. The creek flows southfrom Ambler, enters the Wissahickon Schist just south of the Philadelphia County line, and joins the Schuylkill River at Manayunk. Access to Wissahickon Creek and the Wissahickon Creeksection of Fairmount Park, is available from Bells Mill Road atthe northern end of the section, at Valley Green accessible from Wise's Mill Road in the center, and from Ridge Avenue and Lincoln Drive at the southern end (Fig. 1). Hiking trails aredeveloped along both sides of the creek, providing easy accessalong its entire length. Parking lots are provided both at Bells Mill Road and Valley Green, where there is also a small snack bar and restrooms.