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Mount Circeo
Monte Circeo or Cape Circeo ( it, Promontorio del Circeo , la, Mons Circeius) is a mountain promontory that marks the southwestern limit of the former Pontine Marshes, located on the southwest coast of Italy near San Felice Circeo. At the northern end of the Gulf of Gaeta, it is about long by wide at the base, running from east to west and surrounded by the sea on all sides except the north. The land to the northeast is the former ancient Pontine Marshes. Most of the ancient swamp has been reclaimed for agriculture and urban areas. The mountain, the coastal zone as far north as Latina, including the only remaining remnant of the swamp, and two of the Pontine Islands offshore, Zannone and Ponza, have been included in the Circeo National Park. Geology Although a headland, it was not formed by coastal erosion – as headlands are usually formed – but is a remnant of the orogenic processes that created the Apennines. The entire coast of Lazio, on which ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Terracina
Terracina is an Italian city and ''comune'' of the province of Latina, located on the coast southeast of Rome on the Via Appia ( by rail). The site has been continuously occupied since antiquity. History Ancient times Terracina appears in ancient sources with two names: the Latin Tarracina and the Volscian ''Anxur''. The latter is the name of Jupiter himself as a youth ( or ), and was the tutelary god of the city, venerated on the (current Monte S. Angelo), where a temple dedicated to him still exists (see below). The name has been instead pointed out variously as pre-Indo-European origin (Ταρρακινή in ancient Greek), or as Etruscan ( or , the name of the Tarquinii family): in this view, it would precede the Volscian conquest. Terracina occupied a position of notable strategic importance: it is located at the point where the Volscian Hills (an extension of the Lepini Mountains) reach the coast, leaving no space for passage between them and the sea, on a site comma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orogeny
Orogeny is a mountain building process. An orogeny is an event that takes place at a convergent plate margin when plate motion compresses the margin. An ''orogenic belt'' or ''orogen'' develops as the compressed plate crumples and is uplifted to form one or more mountain ranges. This involves a series of geological processes collectively called orogenesis. These include both structural deformation of existing continental crust and the creation of new continental crust through volcanism. Magma rising in the orogen carries less dense material upwards while leaving more dense material behind, resulting in compositional differentiation of Earth's lithosphere ( crust and uppermost mantle). A synorogenic process or event is one that occurs during an orogeny. The word "orogeny" () comes from Ancient Greek (, , + , , ). Although it was used before him, the term was employed by the American geologist G. K. Gilbert in 1890 to describe the process of mountain-building as distinguished f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alberto Carlo Blanc
Alberto Carlo Blanc (30 July 1906 – 3 July 1960, Rome) was an Italian paleontologist who studied human evolution. He was a professor at the University of Pisa, Rome and is best known for the discovery of the Circeo neanderthal skull in February 1939. Blanc was born in Chambéry (Savoy) to Gian Alberto, professor of geochemistry and Maria Menotti. His father Gian Alberto Blanc had also been interested in paleontology and had explored the Romanelli Cave in Salento. Gian Alberto Blanc was a fascist supporter and in 1912 had worked with the anthropologist Aldobrandino Mochi to found a group that worked on human paleontology which became the Italian Institute of Human Paleontology (Istituto Italiano Di Paleontologia Umana) in 1927. Alberto Carlo Blanc graduated in geology from the University of Pisa in 1934, trained under Giuseppe Stefanini following which he spent three years as a researcher at the Pisa Institute before a stint at Sorbonne in 1936-37. On 25 February 1939, Blanc and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neanderthal
Neanderthals (, also ''Homo neanderthalensis'' and erroneously ''Homo sapiens neanderthalensis''), also written as Neandertals, are an extinct species or subspecies of archaic humans who lived in Eurasia until about 40,000 years ago. While the "causes of Neanderthal disappearance about 40,000 years ago remain highly contested," demographic factors such as small population size, inbreeding and genetic drift, are considered probable factors. Other scholars have proposed competitive replacement, assimilation into the modern human genome (bred into extinction), great climatic change, disease, or a combination of these factors. It is unclear when the line of Neanderthals split from that of modern humans; studies have produced various intervals ranging from 315,000 to more than 800,000 years ago. The date of divergence of Neanderthals from their ancestor ''H. heidelbergensis'' is also unclear. The oldest potential Neanderthal bones date to 430,000 years ago, but the classification ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guattari Cave
Monte Circeo or Cape Circeo ( it, Promontorio del Circeo , la, Mons Circeius) is a mountain promontory that marks the southwestern limit of the former Pontine Marshes.located on the southwest coast of Italy near San Felice Circeo. At the northern end of the Gulf of Gaeta, it is about long by wide at the base, running from east to west and surrounded by the sea on all sides except the north. The land to the northeast is the former ancient Pontine Marshes. Most of the ancient swamp has been land reclamation, reclaimed for agriculture and urban areas. The mountain, the coastal zone as far north as Latina, Lazio, Latina, including the only remaining remnant of the swamp, and two of the Pontine Islands offshore, Zannone and Ponza, have been included in the Parco Nazionale del Circeo, Circeo National Park. Geology Although a headland, it was not formed by coastal erosion – as headlands are usually formed – but is a remnant of the Orogeny, orogenic processes that c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Goats Cave
The Goats Cave ( it, Grotta delle Capre) is a cliff-side cave located in San Felice Circeo, Italy. Location The cave is located a few meters above sea level along the coast on the southern side of Mount Circeo in the comune of San Felice Circeo. It can be accessed by land or sea. Description The cave is approximately wide and between to high in the middle of the vault. The cavity is rich in tunnels and chambers, the most prominent of which begins at the far end of the cave and penetrates deeply into the mountain's mass. It likely derives its name from the fact that in the past it was used by shepherds as a shelter for their flocks of goats. Gallery File:Grotta capre.JPG File:Interno grotta capre.JPG File:Sentiero grotta capre.JPG See also * List of caves in Italy The following article shows a list of caves in Italy. Overview Main concentration of Italian caves ( it, grotte, singular: ''grotta'') is close to the Alps and the Apennine Mountains, principally due to kar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Early Jurassic
The Early Jurassic Epoch (geology), Epoch (in chronostratigraphy corresponding to the Lower Jurassic series (stratigraphy), Series) is the earliest of three epochs of the Jurassic Period. The Early Jurassic starts immediately after the Triassic-Jurassic extinction event, 201.3 Ma (million years ago), and ends at the start of the Middle Jurassic 174.1 Ma. Certain rocks of marine origin of this age in Europe are called "Lias Group, Lias" and that name was used for the period, as well, in 19th-century geology. In southern Germany rocks of this age are called Black Jurassic. Origin of the name Lias There are two possible origins for the name Lias: the first reason is it was taken by a geologist from an England, English quarryman's dialect pronunciation of the word "layers"; secondly, sloops from north Cornwall, Cornish ports such as Bude would sail across the Bristol Channel to the Vale of Glamorgan to load up with rock from coastal limestone quarries (lias limestone from S ... [...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 limes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paleogene
The Paleogene ( ; British English, also spelled Palaeogene or Palæogene; informally Lower Tertiary or Early Tertiary) is a geologic period, geologic period and system that spans 43 million years from the end of the Cretaceous Period million years ago (annum, Mya) to the beginning of the Neogene Period Mya. It is the beginning of the Cenozoic Era of the present Phanerozoic Eon. The earlier term Tertiary Period was used to define the span of time now covered by the Paleogene Period and subsequent Neogene Period; despite no longer being recognised as a formal stratigraphy, stratigraphic term, 'Tertiary' is still widely found in earth science literature and remains in informal use. Paleogene is often abbreviated "Pg" (but the United States Geological Survey uses the abbreviation PE for the Paleogene on the Survey's geologic maps). During the Paleogene, evolution of mammals, mammals diversified from relatively small, simple forms into a large group of diverse animals in the wake of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sandstone
Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) silicate grains. Sandstones comprise about 20–25% of all sedimentary rocks. Most sandstone is composed of quartz or feldspar (both silicates) because they are the most resistant minerals to weathering processes at the Earth's surface. Like uncemented sand, sandstone may be any color due to impurities within the minerals, but the most common colors are tan, brown, yellow, red, grey, pink, white, and black. Since sandstone beds often form highly visible cliffs and other topographic features, certain colors of sandstone have been strongly identified with certain regions. Rock formations that are primarily composed of sandstone usually allow the percolation of water and other fluids and are porous enough to store large quantities, making them valuable aquifers and petroleum reservoirs. Quartz-bearing sandstone can be changed into quartzite through metamorphism, usually related to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marl
Marl is an earthy material rich in carbonate minerals, clays, and silt. When hardened into rock, this becomes marlstone. It is formed in marine or freshwater environments, often through the activities of algae. Marl makes up the lower part of the cliffs of Dover, and the Channel Tunnel follows these marl layers between France and the United Kingdom. Marl is also a common sediment in post-glacial lakes, such as the marl ponds of the northeastern United States. Marl has been used as a soil conditioner and neutralizing agent for acid soil and in the manufacture of cement. Description Marl or marlstone is a carbonate-rich mud or mudstone which contains variable amounts of clays and silt. The term was originally loosely applied to a variety of materials, most of which occur as loose, earthy deposits consisting chiefly of an intimate mixture of clay and calcium carbonate, formed under freshwater conditions. These typically contain 35–65% clay and 65–35% carbonate. The te ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Graben
In geology, a graben () is a depressed block of the crust of a planet or moon, bordered by parallel normal faults. Etymology ''Graben'' is a loan word from German, meaning 'ditch' or 'trench'. The word was first used in the geologic context by Eduard Suess in 1883. The plural form is either ''graben'' or ''grabens''. Formation A graben is a valley with a distinct escarpment on each side caused by the displacement of a block of land downward. Graben often occur side by side with horsts. Horst and graben structures indicate tensional forces and crustal stretching. Graben are produced from parallel normal faults, where the displacement of the hanging wall is downward, while that of the footwall is upward. The faults typically dip toward the center of the graben from both sides. Horsts are parallel blocks that remain between graben; the bounding faults of a horst typically dip away from the center line of the horst. Single or multiple graben can produce a rift valley. Half-g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saunders_Quarry-1.jpg "Click for more on -> Sandstone")
