Geologic Map of Paleozoic Rocks in the Mount Morrison Pendant
... The Aspen Meadow Formation is typically laminated to very thin bedded, very fine grained, and undisturbed by burrowing infauna. Deposition is interpreted to have been in relatively deep, quiet water far from shore, during a period with little argillaceous input. The Mount Morrison Sandstone consists ...
... The Aspen Meadow Formation is typically laminated to very thin bedded, very fine grained, and undisturbed by burrowing infauna. Deposition is interpreted to have been in relatively deep, quiet water far from shore, during a period with little argillaceous input. The Mount Morrison Sandstone consists ...
Field Trip Guide to the Upper Cretaceous Hornbrook Formation and
... Coleman, 1985). The timing of this doming is constrained by horizontal lava flows of Table Rocks that are approximately 7 million years old (Hladky, 1998). Hornbrook Formation Cretaceous sediments are abundant along the western margin of North America (Fig. 6). Originally, Cretaceous rocks exposed i ...
... Coleman, 1985). The timing of this doming is constrained by horizontal lava flows of Table Rocks that are approximately 7 million years old (Hladky, 1998). Hornbrook Formation Cretaceous sediments are abundant along the western margin of North America (Fig. 6). Originally, Cretaceous rocks exposed i ...
Hydrogeology of the coastal plain between
... of 1:100 000 by Mory (1994a, b) in 1989. The earliest reports on groundwater are from exploratory drilling for water at Jurien by the Geological Survey of Western Australia (Berliat and Morgan, 1962; Milbourne, 1967). Subsequently the Watheroo – Jurien Bay Line of exploratory water bores, which incl ...
... of 1:100 000 by Mory (1994a, b) in 1989. The earliest reports on groundwater are from exploratory drilling for water at Jurien by the Geological Survey of Western Australia (Berliat and Morgan, 1962; Milbourne, 1967). Subsequently the Watheroo – Jurien Bay Line of exploratory water bores, which incl ...
Map of the 77th Annual Field Conference of Pennsylvania
... beautiful valley having once been a deep sea of water, and the bursting asunder of the mountains at the will of the Great Spirit, to uncover for her the home of her people the vale of the Minisink; the mighty chasm in the mountains, and the twin giants overlooking the vast extent of country to the r ...
... beautiful valley having once been a deep sea of water, and the bursting asunder of the mountains at the will of the Great Spirit, to uncover for her the home of her people the vale of the Minisink; the mighty chasm in the mountains, and the twin giants overlooking the vast extent of country to the r ...
Post-Hercynian formations of the western Tauern window
... There are local names for this formation in the central Tauern window, e.g., Seidlwinkltrias ( C O R N E L I U S & CLAR, 1939), Hochtortrias (PREY, 1939). The Middle Triassic carbonate formation begins with a thin, sometimes thickening horizon of cargneules. The typically fine-porous, quartz-bearing ...
... There are local names for this formation in the central Tauern window, e.g., Seidlwinkltrias ( C O R N E L I U S & CLAR, 1939), Hochtortrias (PREY, 1939). The Middle Triassic carbonate formation begins with a thin, sometimes thickening horizon of cargneules. The typically fine-porous, quartz-bearing ...
The Nuneaton Millennium Project
... The local streams often rise from springs associated with the sandstone aquifers; these can comprise remarkably pure hard or soft water. Some these streams run for kilometres (miles) on clean sandy soils and rocks. In latter times groundwater and streams became polluted with nitrates from agricultur ...
... The local streams often rise from springs associated with the sandstone aquifers; these can comprise remarkably pure hard or soft water. Some these streams run for kilometres (miles) on clean sandy soils and rocks. In latter times groundwater and streams became polluted with nitrates from agricultur ...
geologic map of the pocatello south quadrangle, bannock and
... and hornblende. Devitrified, pink to light gray stoney groundmass with zeolite-filled cavities and well-developed flow banding. Lower contact placed at the base of lowest volcanic rock. Forms slopes and rare ledges. Thickness at least 500 feet. Trimble (1976) and Platt (1995) mapped a depositional u ...
... and hornblende. Devitrified, pink to light gray stoney groundmass with zeolite-filled cavities and well-developed flow banding. Lower contact placed at the base of lowest volcanic rock. Forms slopes and rare ledges. Thickness at least 500 feet. Trimble (1976) and Platt (1995) mapped a depositional u ...
Geology of the Eagle Mountains, Hudspeth County, Texas
... late Turonian, were deposited along the eastern margin of the Chihuahua Trough; they constitute most of the pre-Cenozoic rocks exposed in the Eagle Mountains and vicinity. The Comanche and Gulf Series, together comprising nine lithologically distinct formations, have been recognized. An unconformity ...
... late Turonian, were deposited along the eastern margin of the Chihuahua Trough; they constitute most of the pre-Cenozoic rocks exposed in the Eagle Mountains and vicinity. The Comanche and Gulf Series, together comprising nine lithologically distinct formations, have been recognized. An unconformity ...
geologic trips to the Sea Ranch
... so that periodically the sediments became unstable, probably during storms or earthquakes. When the sediments became unstable, they mixed with sea water and formed a dense turbidity flow that moved down the flank of the basin like an underwater avalanche.The sediments were then deposited on the ocea ...
... so that periodically the sediments became unstable, probably during storms or earthquakes. When the sediments became unstable, they mixed with sea water and formed a dense turbidity flow that moved down the flank of the basin like an underwater avalanche.The sediments were then deposited on the ocea ...
NWGS NE WA
... Prior to 1992, the entire Deer Trail Group was widely viewed as 1.5 Ga-1.4 Ga in age and correlative with the upper Belt-Purcell Supergroup (Wallace and Mt. Shields Formation) (Campbell and Loofbourow, 1962; Becraft and Weis, 1963; Evans, 1987; Miller and Whipple, 1989; Miller and Clark, 1975). This ...
... Prior to 1992, the entire Deer Trail Group was widely viewed as 1.5 Ga-1.4 Ga in age and correlative with the upper Belt-Purcell Supergroup (Wallace and Mt. Shields Formation) (Campbell and Loofbourow, 1962; Becraft and Weis, 1963; Evans, 1987; Miller and Whipple, 1989; Miller and Clark, 1975). This ...
Conglomerates - Cal State LA
... Crude to good planar horizontal or inclined stratification Tabular & trough x-beds , less common than S.S May have normal & inverse grading ...
... Crude to good planar horizontal or inclined stratification Tabular & trough x-beds , less common than S.S May have normal & inverse grading ...
Strike and dip refer to the orientation or attitude of a geologic feature
... During deformation rocks may break (faults and joints) or bend and form folds. When the strata are bent upwards the structure is an anticline and when the strata are bent downwards the structure is a syncline (Fig. 5). Note that in an anticline the oldest rocks are in the center of the fold while in ...
... During deformation rocks may break (faults and joints) or bend and form folds. When the strata are bent upwards the structure is an anticline and when the strata are bent downwards the structure is a syncline (Fig. 5). Note that in an anticline the oldest rocks are in the center of the fold while in ...
the Middle to Upper Cambrian carbonate shale
... These arguments suggest that the bulk of unit \s is time equivalent to unit \sc. It has a higher carbonate component and coarser siliciclastics than \s, but lithologic similarity of common rock types suggests a link between the two units. This infers a less basinal setting for \sc which is supported ...
... These arguments suggest that the bulk of unit \s is time equivalent to unit \sc. It has a higher carbonate component and coarser siliciclastics than \s, but lithologic similarity of common rock types suggests a link between the two units. This infers a less basinal setting for \sc which is supported ...
GEOLOGIC STRUCTURES
... dome. If the folding pushes downward like a syncline, but including all sides, it forms a depression called a basin. Structural domes and basins generally appear circular or elliptical in shape when seen from above or drawn on a map. Sometimes these structures are found as small features just a few ...
... dome. If the folding pushes downward like a syncline, but including all sides, it forms a depression called a basin. Structural domes and basins generally appear circular or elliptical in shape when seen from above or drawn on a map. Sometimes these structures are found as small features just a few ...
Knockmealdown GWB - Geological Survey of Ireland
... The Old Red Sandstone formations largely contain calcium bicarbonate type water. This indicates that these groundwaters largely contain the more readily dissolved ions such as calcium and bicarbonate. Conductivities in these units are relatively low ranging from 125 to 600 μS/cm, with an average of ...
... The Old Red Sandstone formations largely contain calcium bicarbonate type water. This indicates that these groundwaters largely contain the more readily dissolved ions such as calcium and bicarbonate. Conductivities in these units are relatively low ranging from 125 to 600 μS/cm, with an average of ...
Pennsylvanian Rocks of the Mogollon Rim Area, Arizona
... lithology to the Molas Formation of the Four Corners region. This Queen Creek Canyon section contrasts with the Pennsylvanian sections to the south (in southeastern Arizona) because of the large amount of clastic rocks. The lower 780 feet of the Pennsylvanian barely includes more limestone than sili ...
... lithology to the Molas Formation of the Four Corners region. This Queen Creek Canyon section contrasts with the Pennsylvanian sections to the south (in southeastern Arizona) because of the large amount of clastic rocks. The lower 780 feet of the Pennsylvanian barely includes more limestone than sili ...
GUIDE TO THE GEOLOGY OF BRADGATE PARK AND
... however, it is clear that more isotopic determinations will be needed in order to constrain the entire age-range of the succession. Mode of origin of the Charnian Supergroup Evidence concerning the mode of formation of the Charnian sequence is at first sight contradictory. In the south and east - f ...
... however, it is clear that more isotopic determinations will be needed in order to constrain the entire age-range of the succession. Mode of origin of the Charnian Supergroup Evidence concerning the mode of formation of the Charnian sequence is at first sight contradictory. In the south and east - f ...
the karuah bypass - Australian Geomechanics Society
... The area considered in this study lies within a geological region which is generally referred to as the New England Fold Belt (NEFB) ranging in age from late Devonian to Late Carboniferous (Carey and Browne, 1938). It is more correctly described as the New England Orogen, although the more tradition ...
... The area considered in this study lies within a geological region which is generally referred to as the New England Fold Belt (NEFB) ranging in age from late Devonian to Late Carboniferous (Carey and Browne, 1938). It is more correctly described as the New England Orogen, although the more tradition ...
PDF file - the Kansas Geological Survey
... Pennsylvanian-Permian Boundary. At this location we are very close to the Flint Hills. The eastern boundary of the Flint Hills can be defined by rocks deposited during the Permian Period (about 290 million years ago), which are slightly younger than the Pennsylvanian rocks at Echo Cliff. The Pennsyl ...
... Pennsylvanian-Permian Boundary. At this location we are very close to the Flint Hills. The eastern boundary of the Flint Hills can be defined by rocks deposited during the Permian Period (about 290 million years ago), which are slightly younger than the Pennsylvanian rocks at Echo Cliff. The Pennsyl ...
PALEOZOIC SUCCESSION IN THAILAND
... and flysch type sediments in the east, but with local unconformities. In the middle part of the fold belt pronounced unconformities on the Silurian-Devonian rocks are overlain by thick volcanic agglomerates and possibly marine red-beds underlying Lower Permian limestone. Carboniferous volcanic rocks ...
... and flysch type sediments in the east, but with local unconformities. In the middle part of the fold belt pronounced unconformities on the Silurian-Devonian rocks are overlain by thick volcanic agglomerates and possibly marine red-beds underlying Lower Permian limestone. Carboniferous volcanic rocks ...
Geology of the Jolon and Williams Hill Quadrangles Monterey County, California (USGS BUlletin 1181-Q 1965)
... The Vaqueros Formation crops out southwest of the San Antonio River, where it is in fault contact with older rocks. The exposed part of the formation is no more than 850 feet thick. The Vaqueros isi chiefly fine- and medium-grained arkosic sandstone and contains fossil marine mollusks that indicate ...
... The Vaqueros Formation crops out southwest of the San Antonio River, where it is in fault contact with older rocks. The exposed part of the formation is no more than 850 feet thick. The Vaqueros isi chiefly fine- and medium-grained arkosic sandstone and contains fossil marine mollusks that indicate ...
Stratigraphy and Structure Canberra 1:50 000 Geological Map Area
... Riverside Formation and the City Hill Shale. On the accompanying map the base of the Canberra Group has been lowered to include the Camp Hill Sandstone, which is thought to conformably underlie the Turner Mudstone, and the upper limit of the Canberra Group has been raised to include the St John's Ch ...
... Riverside Formation and the City Hill Shale. On the accompanying map the base of the Canberra Group has been lowered to include the Camp Hill Sandstone, which is thought to conformably underlie the Turner Mudstone, and the upper limit of the Canberra Group has been raised to include the St John's Ch ...
guidelines on the description and classification of rocks
... underlying much of the lower Tuen Mun Valley between Castle Peak Bay in the south, and Ha Tsuen in the north. Location: Type area is located on the low hills which overlook northwestern Tuen Mun where the best exposures of fresh rock are found. Eastern outcrops are concealed by superficial deposits. ...
... underlying much of the lower Tuen Mun Valley between Castle Peak Bay in the south, and Ha Tsuen in the north. Location: Type area is located on the low hills which overlook northwestern Tuen Mun where the best exposures of fresh rock are found. Eastern outcrops are concealed by superficial deposits. ...
Crustal Deformation
... centimeters), foliation forms by a variety of mechanisms, but always at right angles to the direction of greatest compression • On a large scale (centimeters to kilometers), rocks fold. The axial plane of the fold is also at right angles to the direction of greatest compression ...
... centimeters), foliation forms by a variety of mechanisms, but always at right angles to the direction of greatest compression • On a large scale (centimeters to kilometers), rocks fold. The axial plane of the fold is also at right angles to the direction of greatest compression ...
Preliminary Geologic Map of the - New Mexico Bureau of Geology
... Precambrian units and structures were remapped with resulting new insights into the tectonic evolution of central New Mexico. The Paleoproterozoic rocks of the Becker quadrangle and adjacent Scholle quadrangle had been mapped by Myers et al. (1981) and Myers (1977), respectively, as a west-dipping h ...
... Precambrian units and structures were remapped with resulting new insights into the tectonic evolution of central New Mexico. The Paleoproterozoic rocks of the Becker quadrangle and adjacent Scholle quadrangle had been mapped by Myers et al. (1981) and Myers (1977), respectively, as a west-dipping h ...
Geology of the Capitol Reef area
The exposed geology of the Capitol Reef area presents a record of mostly Mesozoic-aged sedimentation in an area of North America in and around Capitol Reef National Park, on the Colorado Plateau in southeastern Utah.Nearly 10,000 feet (3,000 m) of sedimentary strata are found in the Capitol Reef area, representing nearly 200 million years of geologic history of the south-central part of the U.S. state of Utah. These rocks range in age from Permian (as old as 270 million years old) to Cretaceous (as young as 80 million years old.) Rock layers in the area reveal ancient climates as varied as rivers and swamps (Chinle Formation), Sahara-like deserts (Navajo Sandstone), and shallow ocean (Mancos Shale).The area's first known sediments were laid down as a shallow sea invaded the land in the Permian. At first sandstone was deposited but limestone followed as the sea deepened. After the sea retreated in the Triassic, streams deposited silt before the area was uplifted and underwent erosion. Conglomerate followed by logs, sand, mud and wind-transported volcanic ash were later added. Mid to Late Triassic time saw increasing aridity, during which vast amounts of sandstone were laid down along with some deposits from slow-moving streams. As another sea started to return, it periodically flooded the area and left evaporite deposits. Barrier islands, sand bars and later, tidal flats, contributed sand for sandstone, followed by cobbles for conglomerate, and mud for shale. The sea retreated, leaving streams, lakes and swampy plains to become the resting place for sediments. Another sea, the Western Interior Seaway, returned in the Cretaceous and left more sandstone and shale only to disappear in the early Cenozoic.From 70 to 50 million years ago the Laramide orogeny, a major mountain building event in western North America, created the Rocky Mountains to the east. The uplift possibly acted on a buried fault to form the area's Waterpocket Fold. More recent uplift of the entire Colorado Plateau and the resulting erosion has exposed this fold at the surface only within the last 15 to 20 million years. Ice ages in the Pleistocene increased the rate of precipitation and erosion. The cracked upper parts of the Waterpocket Fold were especially affected and the fold itself was exposed and dissected.