GEOLOGY OF THE PURCELL SUPERGROUP SOUTHEASTERN
... The Purcell Supergroup comprises athick accumulation of clastic and carbonaterocks that are interpreted to have been deposited in a large intracratonic basin. The northeastern margin of the hasin is exposed in the northern part of the Fernie west-half sheet. It developed by growth faulting and is ch ...
... The Purcell Supergroup comprises athick accumulation of clastic and carbonaterocks that are interpreted to have been deposited in a large intracratonic basin. The northeastern margin of the hasin is exposed in the northern part of the Fernie west-half sheet. It developed by growth faulting and is ch ...
STRUCTURE AND DEVONIAN STRATIGRAPHY OF
... Thrust sheets within the salient contain rocks of three contrasting facies above the cosmolite impact breccia marker: facies 1 is a peculiar, anoxic, deepwater, thin-bedded limestone characterized by soft-sediment slump folds and interbedded turbidites that may represent a crater fill that now is e ...
... Thrust sheets within the salient contain rocks of three contrasting facies above the cosmolite impact breccia marker: facies 1 is a peculiar, anoxic, deepwater, thin-bedded limestone characterized by soft-sediment slump folds and interbedded turbidites that may represent a crater fill that now is e ...
the geology of the burren region, co. clare, ireland
... Gort, and to the border between Counties Clare and Galway just south of Tubber (Fig. 3). The southern boundary of the target area is an irregular east-west line that extends from the county boundary in the east (near the village of Tubber) through the towns of Corofin, Kilfenora, Lisdoonvarna, and D ...
... Gort, and to the border between Counties Clare and Galway just south of Tubber (Fig. 3). The southern boundary of the target area is an irregular east-west line that extends from the county boundary in the east (near the village of Tubber) through the towns of Corofin, Kilfenora, Lisdoonvarna, and D ...
Geology of East-Central Idaho
... rocks (Link et al., 1993). However, north of the eastern Snake River Plain, this time interval is represented only by 150 m of the Wilbert and Tyler Peak formations in the southern Lemhi Range (McCandless, 1982) and at most several hundred meters of Wilbert Formation in the southern Beaverhead Range ...
... rocks (Link et al., 1993). However, north of the eastern Snake River Plain, this time interval is represented only by 150 m of the Wilbert and Tyler Peak formations in the southern Lemhi Range (McCandless, 1982) and at most several hundred meters of Wilbert Formation in the southern Beaverhead Range ...
Guidebook
... The Crystalline-Mesozoic Zone is built up of basement shearing nappes, each of them showing large developed metamorphic formations covered by a Mesozoic or Permo-Mesozoic sedimentary envelope. The nappes, of Meso-Cretaceous age, cover each other. They are (up/down) the Bucovinian Nappe, the Subbucov ...
... The Crystalline-Mesozoic Zone is built up of basement shearing nappes, each of them showing large developed metamorphic formations covered by a Mesozoic or Permo-Mesozoic sedimentary envelope. The nappes, of Meso-Cretaceous age, cover each other. They are (up/down) the Bucovinian Nappe, the Subbucov ...
Geology of the Kimberley Region, Western Australia: The East
... and basic igneous rocks. The zones range from greenschist to granulite facies of regional metamorphism. In early Carpentarian times, the type of deformation changed radically and the area reacted to stress during the rest of the Proterozoic almost entirely by dislocation along great faults which fol ...
... and basic igneous rocks. The zones range from greenschist to granulite facies of regional metamorphism. In early Carpentarian times, the type of deformation changed radically and the area reacted to stress during the rest of the Proterozoic almost entirely by dislocation along great faults which fol ...
Open File NFLD/3172 - Department of Natural Resources
... of the foundering of the continental shelf, emplacement of allochthons including oceanic crustal rocks, and subsequent deformational events from Ordovician to Devonian. The region is also an active area for petroleum exploration, although it has yet to yield major discoveries. This field trip explor ...
... of the foundering of the continental shelf, emplacement of allochthons including oceanic crustal rocks, and subsequent deformational events from Ordovician to Devonian. The region is also an active area for petroleum exploration, although it has yet to yield major discoveries. This field trip explor ...
Stratigraphic Framework of the
... arc; it shifted with time to the Alaska-Aleutian Range batholith (Middle Jurassic)and included some recycled older sediments. Clasts from this early Mesozoic volcanic arc are included within the Talkeetna Formation. The Tertiary sequence i s somewhat thinner than the Mesozoic one; it has a maximum t ...
... arc; it shifted with time to the Alaska-Aleutian Range batholith (Middle Jurassic)and included some recycled older sediments. Clasts from this early Mesozoic volcanic arc are included within the Talkeetna Formation. The Tertiary sequence i s somewhat thinner than the Mesozoic one; it has a maximum t ...
Crustal Evolution of the GreatBasin and the Sierra
... ignimbrite flareup; the volume of resulting ash-flow deposits in the Great Basin is not widely appreciated but is an order of magnitude larger than in the well known San Juan and Mogollon-Datil fields in the eastern Cordillera. However, the Great Basin harbors only a fraction of the volume of ash fl ...
... ignimbrite flareup; the volume of resulting ash-flow deposits in the Great Basin is not widely appreciated but is an order of magnitude larger than in the well known San Juan and Mogollon-Datil fields in the eastern Cordillera. However, the Great Basin harbors only a fraction of the volume of ash fl ...
AZTEC QUADRANGLE NEW MEXICO AND COLORADO
... Denver, Colorado. Samples were analyzed by delayed-neutron activation for uranium and thorium content; and by semiquantitative emission spectrometry for 45 other elements. Results of these analyses are shown in Appendix B1. Raw data for the Aztec Quadrangle from the National Hydrogeochemical Stream ...
... Denver, Colorado. Samples were analyzed by delayed-neutron activation for uranium and thorium content; and by semiquantitative emission spectrometry for 45 other elements. Results of these analyses are shown in Appendix B1. Raw data for the Aztec Quadrangle from the National Hydrogeochemical Stream ...
The Picuris Formation - New Mexico Geological Society
... stratigraphic nomenclature of the study area is extraordinarily complex......due to interfingering of distantly and locally derived nonmarine units of widely differing provenance and lithology. There are many examples of published geologic maps with different stratigraphic units mapped in the same pl ...
... stratigraphic nomenclature of the study area is extraordinarily complex......due to interfingering of distantly and locally derived nonmarine units of widely differing provenance and lithology. There are many examples of published geologic maps with different stratigraphic units mapped in the same pl ...
Stratigraphic subdivision of the Hidden and Louis formations, Flin
... flows (Figure GS-2-4a). It includes two mappable members near its base: the Tower member, an aphyric rhyolite unit with associated breccia and mafic tuff (Figures GS-2-4b, -4c, -4d, -4e); and the Icehouse member, a strongly plagioclase-pyroxene-porphyritic basaltic flow (Figures GS-2-5b, -5c, -5d, -5f, ...
... flows (Figure GS-2-4a). It includes two mappable members near its base: the Tower member, an aphyric rhyolite unit with associated breccia and mafic tuff (Figures GS-2-4b, -4c, -4d, -4e); and the Icehouse member, a strongly plagioclase-pyroxene-porphyritic basaltic flow (Figures GS-2-5b, -5c, -5d, -5f, ...
DNR White Pass - Yakima Campbell
... belt, uplift north or northwest of here may have provided the compression necessary to fold the basalt. Palogonite and large pillows in a flow in the Roza overlain by Ellensburg Formation. Veins of green opal can be seen scattered throughout the roadcut. The opal was probably deposited by ground wate ...
... belt, uplift north or northwest of here may have provided the compression necessary to fold the basalt. Palogonite and large pillows in a flow in the Roza overlain by Ellensburg Formation. Veins of green opal can be seen scattered throughout the roadcut. The opal was probably deposited by ground wate ...
The Exposed Passive Margin of North America in Western Cuba
... formed between Yucatan and South America. The onset of shallow-water carbonate sedimentation in the Sierra de los Organos and Cangre belts occurred in the late Oxfordian or earliest Kimmeridgian. Drowning of a carbonate bank, or platform, in the early Tithonian resulted in a considerable uniformity ...
... formed between Yucatan and South America. The onset of shallow-water carbonate sedimentation in the Sierra de los Organos and Cangre belts occurred in the late Oxfordian or earliest Kimmeridgian. Drowning of a carbonate bank, or platform, in the early Tithonian resulted in a considerable uniformity ...
structure and tectonics of the southern gebel duwi area, eastern
... quiescence and has since suffered minor disruption. Folding is minor except for drag folding along ...
... quiescence and has since suffered minor disruption. Folding is minor except for drag folding along ...
Tijeras-Canoncito fault system - New Mexico Geological Society
... southwesterly and is covered by the Ancha Formation; on the north near Carioncito, it joins the Deer Creek and Galisteo Creek faults. Throw is at least 515 m locally, but the actual amount cannot be determined due to removal of the Paleozoic section from the uplifted blocks. Booth (1976) states that ...
... southwesterly and is covered by the Ancha Formation; on the north near Carioncito, it joins the Deer Creek and Galisteo Creek faults. Throw is at least 515 m locally, but the actual amount cannot be determined due to removal of the Paleozoic section from the uplifted blocks. Booth (1976) states that ...
Memoir 36: Geology of Organ Mountains and southern San Andres
... evolution of the range and to repeated movements on the boundary fault along its eastern margin. Another objective in this study was to distinguish among these deposits and relate them to the Quaternary erosional and faulting history of the range. Field work was done between 1975 and 1978, mostly du ...
... evolution of the range and to repeated movements on the boundary fault along its eastern margin. Another objective in this study was to distinguish among these deposits and relate them to the Quaternary erosional and faulting history of the range. Field work was done between 1975 and 1978, mostly du ...
Students report
... Leaving Las Vegas on E Lake Mead Boulevard. Road 147 leads to the northern flank of Frenchman Mountain after ~3km. There is a small parking lot, but cullet on the ground inhibits easy parking, so cars have to stay on the road and pull over. The well accessible key part of the outcrop is located ~50m ...
... Leaving Las Vegas on E Lake Mead Boulevard. Road 147 leads to the northern flank of Frenchman Mountain after ~3km. There is a small parking lot, but cullet on the ground inhibits easy parking, so cars have to stay on the road and pull over. The well accessible key part of the outcrop is located ~50m ...
Tectono-stratigraphic framework of Neoproterozoic to Cambrian
... volcanic rocks in Utah, Nevada, and SE Idaho record a dynamically evolving landscape along the North American Cordillera margin, which included: (1) initial development of intracratonic basins with deposition of siliciclastic strata of the Uinta Mountain Group from ~770 to 740 Ma; (2) early rifting ...
... volcanic rocks in Utah, Nevada, and SE Idaho record a dynamically evolving landscape along the North American Cordillera margin, which included: (1) initial development of intracratonic basins with deposition of siliciclastic strata of the Uinta Mountain Group from ~770 to 740 Ma; (2) early rifting ...
stratigraphy of the albuquerque basin, rio
... Petroleum Tamara #1-Y) also encountered this unit in the Calabacillas sub-basin. The unit of Isleta #2 is composed of purplish-red to gray, subarkosic, volcanic-bearing sandstone with mudstone interbeds, and is therefore quite different from the composition of the Espinaso Formation. It is quite qua ...
... Petroleum Tamara #1-Y) also encountered this unit in the Calabacillas sub-basin. The unit of Isleta #2 is composed of purplish-red to gray, subarkosic, volcanic-bearing sandstone with mudstone interbeds, and is therefore quite different from the composition of the Espinaso Formation. It is quite qua ...
Structural and stratigraphic control of porphyry and related
... in the western part of the Stikine arc terrane. Major deposits along this trend include Kerr-Sulphurets-Mitchell (KSM), Brucejack, SilbakPremier, Big Missouri, Scottie Gold and Red Mountain. All are hosted by volcanic and sedimentary rocks of the Hazelton Group (Lower Jurassic) and its subvolcanic f ...
... in the western part of the Stikine arc terrane. Major deposits along this trend include Kerr-Sulphurets-Mitchell (KSM), Brucejack, SilbakPremier, Big Missouri, Scottie Gold and Red Mountain. All are hosted by volcanic and sedimentary rocks of the Hazelton Group (Lower Jurassic) and its subvolcanic f ...
NWGS Methow
... accompanied by, and certainly was followed by, eastwardverging thrust faulting of the mid-Cretaceous Chwwanten fault system. These faults may be inferred to have been active from mid-AIbian (the time foreland-basin deposition was initiated) to about 90 Ma (the age of the youngest, Midnight Peak, str ...
... accompanied by, and certainly was followed by, eastwardverging thrust faulting of the mid-Cretaceous Chwwanten fault system. These faults may be inferred to have been active from mid-AIbian (the time foreland-basin deposition was initiated) to about 90 Ma (the age of the youngest, Midnight Peak, str ...
Stratigraphy, Structure, and Petrology of the
... Forest for arranging a camping location while in the field, and for providing useful suggestions about access into the area; Burlington Northern Railroad for the lending of aerial photographs; the William V. Johnston family, of Mercer Island, Washington, for use of their chalet in Alpental Valley; m ...
... Forest for arranging a camping location while in the field, and for providing useful suggestions about access into the area; Burlington Northern Railroad for the lending of aerial photographs; the William V. Johnston family, of Mercer Island, Washington, for use of their chalet in Alpental Valley; m ...
Colon fold belt of Honduras - California State University Stanislaus
... and this study. Eastern Honduras is an ideal area to examine preTertiary tectonic history of the Chortis block because the area has remained tectonically stable in the Cenozoic and therefore has not been overprinted by tectonic events affecting either the North American–Caribbean strike-slip boundar ...
... and this study. Eastern Honduras is an ideal area to examine preTertiary tectonic history of the Chortis block because the area has remained tectonically stable in the Cenozoic and therefore has not been overprinted by tectonic events affecting either the North American–Caribbean strike-slip boundar ...
Geology of the Bryce Canyon area
The exposed geology of the Bryce Canyon area in Utah shows a record of deposition that covers the last part of the Cretaceous Period and the first half of the Cenozoic era in that part of North America. The ancient depositional environment of the region around what is now Bryce Canyon National Park varied from the warm shallow sea (called the Cretaceous Seaway) in which the Dakota Sandstone and the Tropic Shale were deposited to the cool streams and lakes that contributed sediment to the colorful Claron Formation that dominates the park's amphitheaters.Other formations were also formed but were mostly eroded following uplift from the Laramide orogeny which started around 70 million years ago (mya). This event created the Rocky Mountains far to the east and helped to close the sea that covered the area. A large part of western North America started to stretch itself into the nearby Basin and Range topography around 15 mya. While not part of this region, the greater Bryce area was stretched into the High Plateaus by the same forces. Uplift of the Colorado Plateaus and the opening of the Gulf of California by 5 mya changed the drainage of the Colorado River and its tributaries, including the Paria River, which is eroding headward in between two plateaus adjacent to the park. The uplift caused the formation of vertical joints which were later preferentially eroded to form the free-standing pinnacles called hoodoos, badlands, and monoliths we see today. The formations exposed in the area of the park are part of the Grand Staircase. The oldest members of this supersequence of rock units are exposed in the Grand Canyon, the intermediate ones in Zion National Park, and its youngest parts are laid bare in Bryce Canyon area. A small amount of overlap occurs in and around each park.