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Fossil Beach
A fossil beach, also known as a paleo-beach, fossil strandline or raised beach, is an ancient oceanic or lacustrine beach preserved in fossil form due to a change in water level or sea level, or because of a shift in terrain elevation. It is often present as a sediment layer or terrace, with beach-related fossils and features, above the present shoreline. Causes Emerged shorelines relative to the sea level are created because of three main causes: tectonic movements that result in changes in terrain elevation, isostatic lifting and warping due to unloading of ice sheets and sea water masses during deglaciation, and eustatic drops of sea levels during glaciations. The effects produced by these three causes are often superposed, which complexifies the interpretation of ancient shorelines, and the evaluation of former sea levels during the Quaternary. Location and research In the United States, fossil beaches may be discovered where a limestone quarry or strip mining operat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Playa Miocena
Playa (plural playas) may refer to: Landforms * Endorheic basin, also known as a sink, alkali flat or sabkha, a desert basin with no outlet which periodically fills with water to form a temporary lake * Dry lake, often called a ''playa'' in the southwestern United States Populated places United States * Playas, New Mexico, an unincorporated community in New Mexico * Playa, Añasco, Puerto Rico, a barrio in the municipality of Añasco, Puerto Rico * Playa, Guayanilla, Puerto Rico, a barrio in the municipality of Guayanilla, Puerto Rico * Playa, Ponce, Puerto Rico, a barrio of Ponce, Puerto Rico * Playa, Santa Isabel, Puerto Rico, a barrio in the municipality of Santa Isabel, Puerto Rico * Playa, Yabucoa, Puerto Rico, a barrio in the municipality of Yabucoa, Puerto Rico Cuba * Playa, Havana, one of the 15 municipalities of the City of Havana, Cuba Ecuador * Playas Canton, Ecuador ** Playas, Ecuador, the administrative center of the Playas Canton Other * The Playa, Black Rock Des ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eustasy
The eustatic sea level is the distance from the center of the earth to the sea surface. An increase of the eustatic sea level can be generated by decreasing glaciation, increasing spreading rates of the mid-ocean ridges or more mid-oceanic ridges. Conversely, increasing glaciation, decreasing spreading rates or fewer mid-ocean ridges lead to a fall of the eustatic sea level. Changes in the eustatic sea level lead to changes in accommodation and therefore affect the deposition of sediments in marine environments. Eustatic (global) sea level refers to the volume of Earth’s oceans. This is not a physical level but instead represents the sea level if all of the water in the oceans were contained in a single basin. Eustatic sea level is not relative to local surfaces, because relative sea level is dependent on many factors including tectonics, continental rise and subsidence. Eustatic sea level follows the ‘bathtub approach’ which describes the ocean as a single bathtub. One can ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Global Warming
In common usage, climate change describes global warming—the ongoing increase in global average temperature—and its effects on Earth's climate system. Climate variability and change, Climate change in a broader sense also includes previous long-term changes to Earth's climate. The Instrumental temperature record, current rise in global average temperature is more rapid than previous changes, and is Scientific consensus on climate change, primarily caused by humans burning fossil fuels. Fossil fuel use, deforestation, and some Greenhouse gas emissions from agriculture, agricultural and Environmental impact of concrete, industrial practices Greenhouse gas emissions, increase greenhouse gases, notably carbon dioxide and Methane emissions, methane. Greenhouse gases greenhouse effect, absorb some of the heat that the Earth radiates after it warms from sunlight. Larger amounts of these gases Earth's Energy Imbalance, trap more heat in Earth's lower atmosphere, causing glob ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Portland Stone
Portland stone is a limestone from the Tithonian stage of the Jurassic period quarried on the Isle of Portland, Dorset. The quarries are cut in beds of white-grey limestone separated by chert beds. It has been used extensively as a building stone throughout the British Isles, notably in major public buildings in London such as St Paul's Cathedral and Buckingham Palace. Portland Stone is also exported to many countries—being used for example in the United Nations headquarters in New York City. Geology Portland Stone formed in a marine environment, on the floor of a shallow, warm, sub-tropical sea probably near land (as evidenced by fossilized driftwood, which is not uncommon). When seawater is warmed by the sun, its capacity to hold dissolved gas is reduced; consequently, dissolved carbon dioxide (CO2) is released into the atmosphere as a gas. Calcium and bicarbonate ions within the water are then able to combine, to form calcium carbonate (CaCO3) as a precipitate. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isle Of Portland
An isle is an island, land surrounded by water. The term is very common in British English. However, there is no clear agreement on what makes an island an isle or its difference, so they are considered synonyms. Isle may refer to: Geography * Isle (river), a river in France * Isle, Haute-Vienne, a commune of the Haute-Vienne ''département'' in France * Isle, Minnesota, a small city in the United States * River Isle, a river in England Arts, entertainment, and media * ''Interdisciplinary Studies in Literature and Environment'' (or ''ISLE''), a journal published by Oxford University Press for the Association for the Study of Literature and Environment *''The Isle'', 2017 film with Conleth Hill * '' The Isle'', a 2000 South Korean film directed by Kim Ki-duk * ''Isle'' (album) Other uses * International Society for the Linguistics of English (ISLE), a learned society of linguists See also * Aisle, a space for walking, e.g., in a church, classroom, theatre, supermarket, e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tamiami Formation
The Tamiami Formation is a Late Miocene to Pliocene geologic formation in the southwest Florida peninsula. Age Period: Neogene Epoch: Late Miocene to Pliocene Faunal stage: Clarendonian through Blancan ~13.06–2.588 mya, calculates to a period of Location The Tamiami Formation appears in the counties of Charlotte, Lee, Hendry, Collier and Monroe. It is widespread in Florida and part of the intermediate confining aquifer system. The Tamiami formation overlies the Hawthorn at every locality where the Hawthorn has been penetrated and is overlain unconformably by the Caloosahatchee marl of the Pliocene in Charlotte County. Composition The Tamiami Formation contains a wide range of mixed carbonate-siliciclastic lithologies and associated faunas. It occurs at or near the land surface in the southern peninsula with numerous named and unnamed members recognized within the Tamiami Formation. Its unevenness indicates that the upper part has been subjected to erosion.Missimer, T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pinecrest, Florida
Pinecrest is a suburban village in Miami-Dade County, Florida, United States. The 2010 U.S. census recorded a population of 18,223; as of 2019, this has increased by over five percent to an estimated 19,155. Pinecrest is governed by a five-member Village Council and operates under the Council-Manager form of government. 33156, the zip code that encompasses most of the village, has been consistently ranked as one of the most expensive in the United States. Geography Pinecrest is located at (25.6619, −80.3076). According to the U.S. Census Bureau, the village has a total area of . of it is land and 0.13% is water. Community projects Pinecrest's projects since 1996 include the addition of several new parks, development of Wi-Fi technology and beautification projects which included thousands of trees being planted, unique street signs being posted Village-wide, and roads being repaved. By planting over 10,000 street trees since 1997, Pinecrest was named a Tree City USA c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Miami, Florida
Miami ( ), officially the City of Miami, known as "the 305", "The Magic City", and "Gateway to the Americas", is a coastal metropolis and the county seat of Miami-Dade County in South Florida, United States. With a population of 442,241 at the 2020 census, it is the second-most populous city in Florida and the eleventh-most populous city in the Southeastern United States. The Miami metropolitan area is the ninth largest in the U.S. with a population of 6.138 million in 2020. The city has the third-largest skyline in the U.S. with over 300 high-rises, 58 of which exceed . Miami is a major center and leader in finance, commerce, culture, arts, and international trade. Miami's metropolitan area is by far the largest urban economy in Florida and the 12th largest in the U.S., with a GDP of $344.9 billion as of 2017. According to a 2018 UBS study of 77 world cities, Miami is the second richest city in the U.S. and third richest globally in purchasing power. Miami is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Limestone
Limestone ( calcium carbonate ) is a type of carbonate sedimentary rock which is the main source of the material lime. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of . Limestone forms when these minerals precipitate out of water containing dissolved calcium. This can take place through both biological and nonbiological processes, though biological processes, such as the accumulation of corals and shells in the sea, have likely been more important for the last 540 million years. Limestone often contains fossils which provide scientists with information on ancient environments and on the evolution of life. About 20% to 25% of sedimentary rock is carbonate rock, and most of this is limestone. The remaining carbonate rock is mostly dolomite, a closely related rock, which contains a high percentage of the mineral dolomite, . ''Magnesian limestone'' is an obsolete and poorly-defined term used variously for dolomite, for lime ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quaternary
The Quaternary ( ) is the current and most recent of the three period (geology), periods of the Cenozoic era (geology), Era in the geologic time scale of the International Commission on Stratigraphy (ICS). It follows the Neogene Period and spans from 2.58 million years ago to the present. The Quaternary Period is divided into two epochs: the Pleistocene (2.58 million years ago to 11.7 thousand years ago) and the Holocene (11.7 thousand years ago to today, although a third epoch, the Anthropocene, has been proposed but is not yet officially recognised by the ICS). The Quaternary Period is typically defined by the cyclic growth and decay of continental ice sheets related to the Milankovitch cycles and the associated climate and environmental changes that they caused. Research history In 1759 Giovanni Arduino (geologist), Giovanni Arduino proposed that the geological strata of northern Italy could be divided into four successive formations or "orders" ( it, quattro ord ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glaciations
A glacial period (alternatively glacial or glaciation) is an interval of time (thousands of years) within an ice age that is marked by colder temperatures and glacier advances. Interglacials, on the other hand, are periods of warmer climate between glacial periods. The Last Glacial Period ended about 15,000 years ago. The Holocene is the current interglacial. A time with no glaciers on Earth is considered a greenhouse climate state. Quaternary Period Within the Quaternary, which started about 2.6 million years before present, there have been a number of glacials and interglacials. At least eight glacial cycles have occurred in the last 740,000 years alone. Penultimate Glacial Period The Penultimate Glacial Period (PGP) is the glacial period that occurred before the Last Glacial Period. It began about 194,000 years ago and ended 135,000 years ago, with the beginning of the Eemian interglacial. Last Glacial Period The last glacial period was the most recent glacial period w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deglaciation
Deglaciation is the transition from full glacial conditions during ice ages, to warm interglacials, characterized by global warming and sea level rise due to change in continental ice volume. Thus, it refers to the retreat of a glacier, an ice sheet or frozen surface layer, and the resulting exposure of the Earth's surface. The decline of the cryosphere due to ablation can occur on any scale from global to localized to a particular glacier. After the Last Glacial Maximum (ca. 21,000 years ago), the last deglaciation begun, which lasted until the early Holocene. Around much of Earth, deglaciation during the last 100 years has been accelerating as a result of climate change, partly brought on by anthropogenic changes to greenhouse gases. The previous deglaciation took place from approximately 22 ka until 11.5 ka. This occurred when there was an annual mean atmospheric temperature on the earth that increased by roughly 5 °C, which was also accompanied by regional ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
