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La Huérguina Formation
The La Huérguina Formation (also known as the Calizas de La Huérguina Formation, La Huérguina Limestone Formation or as the Una Formation) is a geological Formation (geology), formation in Spain whose strata date back to the Barremian stage of the Early Cretaceous.Martínez et al., 2017 Las Hoyas is a Konservat-Lagerstätte within the formation, located near the city of Cuenca, Spain. The site is mostly known for its exquisitely preserved dinosaurs, especially enantiornithes, enantiornithines.Weishampel et al., 2004, pp.556-563 The lithology of the formation mostly consists of Lacustrine deposits, lacustrine limestone deposited in a freshwater wetland environment. Las Hoyas Taphonomy As a Lagerstätte#Important Konservat-Lagerstätten, Konservat-Lagerstätten, the preservation is exceptional. This may be a result of three factors: Microbial mats, Obruption and Stagnation. Microbial mats may be responsible for the preservation of soft tissue in many fossils from Las Hoyas, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geological Formation
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 (geology), 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cuenca, Spain
Cuenca () is a city and municipalities in Spain, municipality of Spain located in the Autonomous communities of Spain, autonomous community of Castilla–La Mancha. It is the capital of the Province of Cuenca. Etymology Its name may derive from the Latin ''conca'' meaning "river basin", referring to the gorge of the rivers Júcar and Huécar. It may also be derived from the now-ruined Arab castle, Kunka. Other alternative original names have been suggested, including "Anitorgis", "Sucro" or "Concava". The city of Cuenca is also known as the "Eagle's Nest" because of its precarious position on the edge of a gorge. History When the Iberian Peninsula, Iberian peninsula was part of the Roman Empire, there were several important settlements in the province, such as Segobriga, Ercavica and Valeria, Spain (Roman City), Gran Valeria. However, the place where Cuenca is located today was uninhabited at that time. When the Muslims captured the area in 714, they soon realized the value ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phylum
In biology, a phylum (; : phyla) is a level of classification, or taxonomic rank, that is below Kingdom (biology), kingdom and above Class (biology), class. Traditionally, in botany the term division (taxonomy), division has been used instead of phylum, although the International Code of Nomenclature for algae, fungi, and plants accepts the terms as equivalent. Depending on definitions, the animal kingdom Animalia contains about 31 phyla, the plant kingdom Plantae contains about 14 phyla, and the fungus kingdom Fungi contains about eight phyla. Current research in phylogenetics is uncovering the relationships among phyla within larger clades like Ecdysozoa and Embryophyta. General description The term phylum was coined in 1866 by Ernst Haeckel from the Greek (, "race, stock"), related to (, "tribe, clan"). Haeckel noted that species constantly evolved into new species that seemed to retain few consistent features among themselves and therefore few features that distinguishe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fauna
Fauna (: faunae or faunas) is all of the animal life present in a particular region or time. The corresponding terms for plants and fungi are ''flora'' and '' funga'', respectively. Flora, fauna, funga and other forms of life are collectively referred to as '' biota''. Zoologists and paleontologists use ''fauna'' to refer to a typical collection of animals found in a specific time or place, e.g. the " Sonoran Desert fauna" or the " Burgess Shale fauna". Paleontologists sometimes refer to a sequence of faunal stages, which is a series of rocks all containing similar fossils. The study of animals of a particular region is called faunistics. Etymology ''Fauna'' comes from the name Fauna, a Roman goddess of earth and fertility, the Roman god Faunus, and the related forest spirits called Fauns. All three words are cognates of the name of the Greek god Pan, and ''panis'' is the Modern Greek equivalent of fauna (πανίς or rather πανίδα). ''Fauna'' is also the word fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frenelopsis
''Frenelopsis'' is a genus of extinct conifers belonging to the family Cheirolepidiaceae that lived throughout the Cretaceous period ranging from the Berriasian to the Maastrichtian stages, containing a total of 18 species. It is a form classification describing the shoots of the plant, and is accompanied by the genera ''Classopollis'', '' Classostrobus'', and '' Alvinia''. These represent the pollen, male cones, and female cones respectively. They are likely to have been a major source of lignite in Cretaceous deposits. Description and biology The shoots of ''Frenelopsis'' consist of a round, jointed stem with small, sheathing leaves at the nodes. The leaves are arranged oppositely or in whorls of three. The latter of the two is the most common in the genus. The leaves' margins are lined with hairs. It is speculated that these hairs are used to capture atmospheric moisture at night. The stems are coated in a thick cuticle and the stomata are recessed in sunken pits. The guard cel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Montsechia
''Montsechia'' is an extinct genus of aquatic plants containing the species ''Montsechia vidalii'', described from Spain. ''M. vidalii'' lived about 130 million years ago, during the Barremian age, and appears to be the earliest known flowering plant macrofossil. It has affinities with the modern genus ''Ceratophyllum ''Ceratophyllum'' is a cosmopolitan distribution, cosmopolitan genus of flowering plants commonly found in ponds, marshes, and quiet streams in tropical and in temperate regions. It is the only extant taxon, extant genus in the family Ceratophyll ...''. It has been placed in the ceratophyllalean family Montsechiaceae. See also *'' Archaefructus'' References Early Cretaceous plants Cretaceous angiosperms Prehistoric angiosperm genera {{cretaceous-plant-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charophytes
Charophyta () is a Paraphyly, paraphyletic group of freshwater green algae, called charophytes (), sometimes treated as a Division (taxonomy), division, yet also as a Division (taxonomy), superdivision. The terrestrial plants, the Embryophyta emerged deep within Charophyta, possibly from terrestrial unicellular charophytes, with the class Zygnematophyceae as a sister group. With the Embryophyta now cladistically placed in the Charophyta, it is a synonym of Streptophyta. The sister group of the charophytes are the Chlorophyta. In some charophyte groups, such as the Zygnematophyceae or conjugating green algae, Flagellum, flagella are absent and sexual reproduction does not involve free-swimming flagellate sperm. Flagellate sperm, however, are found in stoneworts (Charales) and Coleochaetales, orders of parenchymatous charophytes that are the closest relatives of the land plants, where flagellate sperm are also present in all except the Pinophyta, conifers and Angiosperm, flowering ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flora
Flora (: floras or florae) is all the plant life present in a particular region or time, generally the naturally occurring (indigenous (ecology), indigenous) native plant, native plants. The corresponding term for animals is ''fauna'', and for fungi, it is ''funga''. Sometimes bacteria and fungi are also referred to as flora as in the terms ''gut flora'' or ''skin flora'' for purposes of specificity. Etymology The word "flora" comes from the Latin name of Flora (mythology), Flora, the goddess of plants, flowers, and fertility in Roman mythology. The technical term "flora" is then derived from a metonymy of this goddess at the end of the sixteenth century. It was first used in poetry to denote the natural vegetation of an area, but soon also assumed the meaning of a work cataloguing such vegetation. Moreover, "Flora" was used to refer to the flowers of an artificial garden in the seventeenth century. The distinction between vegetation (the general appearance of a community) and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Concornis
''Concornis'' is a genus of enantiornithean birds which lived during the early Cretaceous period, in the late Barremian age about 125 million years ago. Its remains are known from the Calizas de La Huérgina Formation at Las Hoyas, Cuenca province, Spain. The single known species, ''Concornis lacustris'', was described from the remains of one fairly complete individual skeleton. Description The holotype of ''Concornis'', MCCM-LH-1184 (also known as LH-2814) was initially described in 1992, while the specimen was still partially covered in sandstone. This preliminary description was published to record an aspect of the specimen which would be erased upon further preparation: faint traces of wing feathers visible under ultraviolet light. Once the specimen was prepared, most of these traces were destroyed but in return the skeleton was able to be studied in closer detail. A large redescription was published in 1995 once further preparation concluded. The specimen is almost compl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pelecanimimus
''Pelecanimimus'' (meaning "pelican mimic") is an extinct genus of basal ("primitive") ornithomimosaurian dinosaur from the Early Cretaceous of Spain. It is notable for possessing more teeth than any other member of the Ornithomimosauria (or any other theropod), most of which were toothless. Discovery and naming In July 1993 Armando Díaz Romeral discovered a theropod skeleton at the ''Las Hoyas Unit 3'' site. In 1994 this was named and described by Bernardino Pérez Pérez-Moreno, José Luis Sanz, Angela Buscalioni, José Moratalla, Francisco Ortega and Diego Rasskin-Gutman as a new species: ''Pelecanimimus polyodon''. The generic name is derived from Latin ''pelecanus'', "pelican", and ''mimus'', "mimic", in reference to the long snout and throat pouch. The specific name is a reference to the large number of teeth possessed by this theropod and is derived from Greek πολύς ('), "many" and ὀδούς (') "tooth". The holotype specimen, LH 7777, part of the Las ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Limestone
Limestone is a type of carbonate rock, carbonate sedimentary rock which is the main source of the material Lime (material), lime. It is composed mostly of the minerals calcite and aragonite, which are different Polymorphism (materials science), crystal forms of calcium carbonate . Limestone forms when these minerals Precipitation (chemistry), 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 (rock), dolomite, a closely related rock, which contains a high percentage of the mineral Dolomite (mine ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
