BILGERS ROCKS, CLEARFIELD COUNTY
... feet thick. Joint separations vary from a few inches to as much as 15-20 feet. As a result, chambers and passageways may be found throughout the rocks. Chamber rooms have vertical walls 15-25 feet in height connected by narrow passageways of the same height and from 15 inches to 3 feet in width. Som ...
... feet thick. Joint separations vary from a few inches to as much as 15-20 feet. As a result, chambers and passageways may be found throughout the rocks. Chamber rooms have vertical walls 15-25 feet in height connected by narrow passageways of the same height and from 15 inches to 3 feet in width. Som ...
Lecture 3 Acadia and Mesa Verde
... Compare/contrast with glacial carving by valley glacier at Yosemite NP ...
... Compare/contrast with glacial carving by valley glacier at Yosemite NP ...
blue mountain anticline at macedonia
... exposed the tip or nose of a complex asymmetrical fold, which plunges northeast. The fold contains smaller (lower) order folds and some sharp-angled chevron folds, low-angle thrust faults (forward and backward), and overturned bedding. The rocks are Silurian age Tuscarora Formation sandstone interbe ...
... exposed the tip or nose of a complex asymmetrical fold, which plunges northeast. The fold contains smaller (lower) order folds and some sharp-angled chevron folds, low-angle thrust faults (forward and backward), and overturned bedding. The rocks are Silurian age Tuscarora Formation sandstone interbe ...
DE pg 101
... Usually organic, because made of pebbles. may be formed from Cemented by clay, mud, & shells of sea animals. sand. Chalk is soft limestone Pebbles are smooth & round, because they are Coal: weathered by water. Made from dead plants Also called puddingstone. Breccia – sharp/angular Sand ...
... Usually organic, because made of pebbles. may be formed from Cemented by clay, mud, & shells of sea animals. sand. Chalk is soft limestone Pebbles are smooth & round, because they are Coal: weathered by water. Made from dead plants Also called puddingstone. Breccia – sharp/angular Sand ...
Map 2
... Sea basins: Mud and limestone deposited in early Jurassic shallow sea in NE, while rest of Ireland is land. Thick accumulations of sediment as today's offshore basins form ...
... Sea basins: Mud and limestone deposited in early Jurassic shallow sea in NE, while rest of Ireland is land. Thick accumulations of sediment as today's offshore basins form ...
Geology and Hydrology of Khwisero District, Kenya
... •Conglomerate composed of 2.5 to 20 cm size clasts composed of basalt, dacite, andesite, rhyolite and granite • Minimum thickness is 260 m • Well exposed around Shivakala, Malinya, Regea and Khwisero • Unconformably overlie Nyanzian Group • Basal unit of Kavirondian Group • Intruded in north by Mumi ...
... •Conglomerate composed of 2.5 to 20 cm size clasts composed of basalt, dacite, andesite, rhyolite and granite • Minimum thickness is 260 m • Well exposed around Shivakala, Malinya, Regea and Khwisero • Unconformably overlie Nyanzian Group • Basal unit of Kavirondian Group • Intruded in north by Mumi ...
PANTHER ROCKS, CLEARFIELD COUNTY
... called joints that have widened over time by frost- or icewedging. Overhangs, crevices, and a short tunnel have formed from an outcrop of medium- to coarse-grained sandstone. Joint separations vary from a few inches to as much as 15-20 feet. From the south side, one can access the top of Panther Roc ...
... called joints that have widened over time by frost- or icewedging. Overhangs, crevices, and a short tunnel have formed from an outcrop of medium- to coarse-grained sandstone. Joint separations vary from a few inches to as much as 15-20 feet. From the south side, one can access the top of Panther Roc ...
Student Handout Rock Unit Descriptions
... sorted; deposited in a non-marine environment very close to the Sierra Nevada; pebbles and cobbles are igneous and metamorphic; contains few, if any, fossils except for petrified wood. Age: Miocene (6-16 m.y.) Chanac Fm [Tch] – Boulder and cobble gravel with sand; unconsolidated; boulders made of me ...
... sorted; deposited in a non-marine environment very close to the Sierra Nevada; pebbles and cobbles are igneous and metamorphic; contains few, if any, fossils except for petrified wood. Age: Miocene (6-16 m.y.) Chanac Fm [Tch] – Boulder and cobble gravel with sand; unconsolidated; boulders made of me ...
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.