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1 giorno fa · The Cretaceous ( IPA: / krɪˈteɪʃəs / krih-TAY-shəs) [2] is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of the entire Phanerozoic.
2 giorni fa · It marked the end of the Cretaceous period, and with it the Mesozoic era, while heralding the beginning of the current era, the Cenozoic. In the geologic record , the K–Pg event is marked by a thin layer of sediment called the K–Pg boundary or K–T boundary , which can be found throughout the world in marine and terrestrial rocks.
1 giorno fa · The Cenozoic Titanochelon were also larger than extant giant tortoises, with a shell length of up to 2 m (6 ft 7 in). Other giant tortoises include Centrochelys marocana at 1.8–2 m (5.9–6.6 ft) in carapace length and Mesoamerican Hesperotestudo sp. at 1.5 m (4.9 ft) in carapace length.
2 giorni fa · Proetida. Ptychopariida. Trilobites ( / ˈtraɪləˌbaɪts, ˈtrɪlə -/; [4] [5] [6] meaning "three lobes") are extinct marine arthropods that form the class Trilobita. Trilobites form one of the earliest known groups of arthropods.
5 giorni fa · This list of fossil sites is a worldwide list of localities known well for the presence of fossils. Some entries in this list are notable for a single, unique find, while others are notable for the large number of fossils found there. Many of the entries in this list are considered Lagerstätten (sedimentary deposits that exhibits ...
16 ore fa · A History. Part One: India and China: "Zen (Chin. Ch'an, an abbreviation of ch'an-na, which transliterates the Sanskrit Dhyāna (Devanagari: ध्यान) or its Pali cognate Jhāna (Sanskrit; Pāli झान), terms meaning "meditation") is the name of a Mahāyāna Buddhist school of meditation originating in China.
15 ore fa · Geographical treatment of North America, including maps and statistics as well as a survey of its geologic history, land, people, and economy. It occupies the northern portion of the ‘New World.’ North America, the world’s third largest continent, lies mainly between the Arctic Circle and the Tropic of Cancer.
