|
Bushnell Rock Member
The Bushnell Rock Member is a geologic rock formation, named after an outcropping of an exposed portion of the member itself known as Bushnell Rock by University of Oregon Geologist Ewart M. Baldwin in 1974. This combined with Tenmile Member and Olalla Creek Member makeup the larger Lookingglass Formation lying beneath the Lookingglass Valley in Douglas County, Oregon. Lithology The Bushnell Rock Member is a basal conglomerate with sandstone beds occurring on a rarity. It was deposited by an onlapping sea that started during the Paleocene but the bulk of the formation was deposited during the early Eocene. The conglomerate is composed of 70% rock fragments (60% sedimentary, 30% metamorphic, 10% volcanic) 1 to 2 inches in diameter and a 30% percent matrix of medium to coarsegrained sands(66% quartz, 33% feldspar). Because the member is not well exposed other than a few limited areas, measurement for the overall stratigraphic thickness has not been achieved. It was determ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Formation (stratigraphy)
A geological formation, or simply formation, is a body of rock having a consistent set of physical characteristics (lithology) that distinguishes it from adjacent bodies of rock, and which occupies a particular position in the layers of rock exposed in a geographical region (the stratigraphic column). It is the fundamental unit of lithostratigraphy, the study of strata or rock layers. A formation must be large enough that it can be mapped at the surface or traced in the subsurface. Formations are otherwise not defined by the thickness of their rock strata, which can vary widely. They are usually, but not universally, tabular in form. They may consist of a single lithology (rock type), or of alternating beds of two or more lithologies, or even a heterogeneous mixture of lithologies, so long as this distinguishes them from adjacent bodies of rock. The concept of a geologic formation goes back to the beginnings of modern scientific geology. The term was used by Abraham Gottlob W ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eocene
The Eocene ( ) Epoch is a geological epoch that lasted from about 56 to 33.9 million years ago (mya). It is the second epoch of the Paleogene Period in the modern Cenozoic Era. The name ''Eocene'' comes from the Ancient Greek (''ēṓs'', " dawn") and (''kainós'', "new") and refers to the "dawn" of modern ('new') fauna that appeared during the epoch. The Eocene spans the time from the end of the Paleocene Epoch to the beginning of the Oligocene Epoch. The start of the Eocene is marked by a brief period in which the concentration of the carbon isotope 13C in the atmosphere was exceptionally low in comparison with the more common isotope 12C. The end is set at a major extinction event called the ''Grande Coupure'' (the "Great Break" in continuity) or the Eocene–Oligocene extinction event, which may be related to the impact of one or more large bolides in Siberia and in what is now Chesapeake Bay. As with other geologic periods, the strata that define the start and e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Douglas County, Oregon
Douglas County is one of the 36 counties in the U.S. state of Oregon. As of the 2020 census, the population was 111,201. The county seat A county seat is an administrative center, seat of government, or capital city of a county or civil parish. The term is in use in Canada, China, Hungary, Romania, Taiwan, and the United States. The equivalent term shire town is used in the US ... is Roseburg. The county is named after Stephen A. Douglas, an American politician who supported Oregon statehood. Douglas County comprises the Roseburg, OR Micropolitan Statistical Area. History The area originally was inhabited by the Umpqua Indians, a grouping of natives who spoke a variety of Penutian and Athabaskan languages. Following the Rogue River Indian War in 1856, most of the remaining natives were moved by the government to the Grand Ronde Indian Reservation. However, seven families of Umpqua hid in the hills, eluding capture for many decades. They are now federally recog ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oregon
Oregon () is a state in the Pacific Northwest region of the Western United States. The Columbia River delineates much of Oregon's northern boundary with Washington, while the Snake River delineates much of its eastern boundary with Idaho. The 42° north parallel delineates the southern boundary with California and Nevada. Oregon has been home to many indigenous nations for thousands of years. The first European traders, explorers, and settlers began exploring what is now Oregon's Pacific coast in the early-mid 16th century. As early as 1564, the Spanish began sending vessels northeast from the Philippines, riding the Kuroshio Current in a sweeping circular route across the northern part of the Pacific. In 1592, Juan de Fuca undertook detailed mapping and studies of ocean currents in the Pacific Northwest, including the Oregon coast as well as the strait now bearing his name. Spanish ships – 250 in as many years – would typically not land before reaching Cape M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Formation (geology)
A geological formation, or simply formation, is a body of rock having a consistent set of physical characteristics (lithology) that distinguishes it from adjacent bodies of rock, and which occupies a particular position in the layers of rock exposed in a geographical region (the stratigraphic column). It is the fundamental unit of lithostratigraphy, the study of strata or rock layers. A formation must be large enough that it can be mapped at the surface or traced in the subsurface. Formations are otherwise not defined by the thickness of their rock strata, which can vary widely. They are usually, but not universally, tabular in form. They may consist of a single lithology (rock type), or of alternating beds of two or more lithologies, or even a heterogeneous mixture of lithologies, so long as this distinguishes them from adjacent bodies of rock. The concept of a geologic formation goes back to the beginnings of modern scientific geology. The term was used by Abraham Gottlob W ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tenmile Member
{{disambiguation, geo ...
Ten Mile or Tenmile may refer to: *10-mile run, running competition over ten miles *Tenmile, Kentucky *Ten Mile, Lewis County, Missouri *Ten Mile, Macon County, Missouri *Tenmile, Coos County, Oregon *Tenmile, Douglas County, Oregon *Ten Mile, Pennsylvania *Ten Mile, Tennessee *Tenmile, West Virginia *Tenmile Range See also *Battle of the Tenth Milestone, fought 533 between the Vandals and the Byzantine Empire *Tenmile Creek (other) *Ten Mile Creek Bridge (other) *Ten Mile Lake (other) *Ten Mile Point (other) * Ten Mile River (other) *Ten Mile Run (other) *Ten Miles "Ten Miles" is a song by the Danish pop band Infernal. It was released in 2006 as the second single from the international edition of '' From Paris to Berlin'', and as the sixth single overall. The song became a moderate success in the dance mus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Olalla Creek Member , an 1885 vampire story by Robert Louis Stevenson ...
Olalla may refer to: Places * Olalla, British Columbia, an unincorporated settlement in the Similkameen Country of the Southern Interior of British Columbia, Canada *Olalla, Washington, an unincorporated settlement on the Kitsap Peninsula in Washington, United States *, locality in Aragon, Spain People Given name *Santa Olalla, Galician name for Saint Eulalia of Mérida Surname * Jesús Olalla (born 1971), Spanish handball player * Julio Olalla (born 1945), former Chilean government lawyer * Milagros Germán Olalla (born 1958), Dominican TV presenter and producer, theatre actress, and the winner of the Miss Dominican Republic 1980 beauty pageant. Other *Olalla (short story) "Olalla" is a short story by the novelist, poet, essayist and travel writer Robert Louis Stevenson. It was first published in the Christmas 1885 issue of ''The Court and Society Review'', then re-published in 1887 as part of the collection ''T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lookingglass Formation
The Lookingglass Formation is a geologic formation in Oregon. It preserves fossils dating back to the Paleogene period. Geologically, it spans a time frame from the Tertiary period to the middle Eocene. It was named for the Lookingglass Valley. It overlies the Roseburg Formation, and is divided into three geologic members: the Bushnell Rock Member, the Tenmile Member, and the Olalla Creek Member. The Bushnell Rock Member is a basal conglomerate, mostly made of 1-2 inch diameter pebbles embedded in a sandstone matrix, deposited by an onlapping (advancing) sea. The Tenmile Member is composed of rhymthically bedded layers of sandstone and siltstone, indicating deposition in quiet water not close to the shore. The Olalla Creek member is composed in some places of conglomerate and pebbly sandstone, and in other places of thinner bedded sandstone and silt, and, where the silt layer is absent, is hard to distinguish from the Bushnell Rock Member. See also * List of fossilife ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lookingglass, Oregon
Lookingglass is an unincorporated community and census-designated place in the Lookingglass Valley of Douglas County, Oregon, United States, about southwest of Roseburg. As of the 2010 census it had a population of 855. Lookingglass is considered a suburb of Roseburg. History The valley was named in 1846 by surveyor Hoy Flournoy, who said the beautiful green grass of the valley reflected light almost as well as a mirror. Flournoy later returned to settle in the area. The Lookingglass Store, built in 1852, was once the terminus for the Oakland to Lookingglass stage and freight road. It was also the beginning of the Coos Bay Wagon Road. Today the store continues to serve as the hub of the community and is the oldest business in Douglas County. Lookingglass also has a school, a grange hall, a church and a fire station. Lookingglass post office closed in 1942. In the 1970s, Lookingglass, population 40 at the time, received national media attention for installing a two-horse pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Fossiliferous Stratigraphic Units In Oregon
This article contains a list of fossil-bearing stratigraphic units in the state of Oregon, U.S. Lists of fossiliferous stratigraphic units Cenozoic Mesozoic Paleozoic See also * Paleontology in Oregon * Lists of Oregon-related topics References {{DEFAULTSORT:Fossiliferous stratigraphic units in Oregon Oregon Oregon () is a U.S. state, state in the Pacific Northwest region of the Western United States. The Columbia River delineates much of Oregon's northern boundary with Washington (state), Washington, while the Snake River delineates much of it ... Stratigraphy of Oregon Oregon geography-related lists United States geology-related lists ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paleontology In Oregon
The location of the state of Oregon Paleontology in Oregon refers to paleontological research occurring within or conducted by people from the U.S. state of Oregon. Oregon's geologic record extends back approximately 400 million years ago to the Devonian period, before which time the state's landmass was likely submerged under water. Sediment records show that Oregon remained mostly submerged until the Paleocene period. The state's earliest fossil record includes plants, corals, and conodonts. Oregon was covered by seaways and volcanic islands during the Mesozoic era. Fossils from this period include marine plants, invertebrates, ichthyosaurs, pterosaurs, and Trace fossil, traces such as invertebrate Burrow (animal), burrows. During the Cenozoic, Oregon's climate gradually cooled and eventually yielded the environments now found in the state. The era's fossils include marine and terrestrial plants, invertebrates, fish, amphibians, turtles, birds, mammals, and traces such as Egg fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Landforms Of Douglas County, Oregon
A landform is a natural or anthropogenic land feature on the solid surface of the Earth or other planetary body. Landforms together make up a given terrain, and their arrangement in the landscape is known as topography. Landforms include hills, mountains, canyons, and valleys, as well as shoreline features such as bays, peninsulas, and seas, including submerged features such as mid-ocean ridges, volcanoes, and the great ocean basins. Physical characteristics Landforms are categorized by characteristic physical attributes such as elevation, slope, orientation, stratification, rock exposure and soil type. Gross physical features or landforms include intuitive elements such as berms, mounds, hills, ridges, cliffs, valleys, rivers, peninsulas, volcanoes, and numerous other structural and size-scaled (e.g. ponds vs. lakes, hills vs. mountains) elements including various kinds of inland and oceanic waterbodies and sub-surface features. Mountains, hills, plateaux, and plains are the fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> Oregon")
.jpg "Click for more on -> Landforms Of Douglas County, Oregon")