these rocks were deposited
1Oldest dated rocks — The oldest dated rocks on Earth, as an aggregate of minerals that have not been subsequently melted or disaggregated by erosion, are from the Archean Eon. Such rocks are exposed on the surface in very few places.[1] There is some controversy… …
2Formation of rocks — This article discusses how rocks are formed. There are also articles on physical rock formations, also known as strata, and the formal naming of geologic formations. The three main ways rocks are formed: * Sedimentary rocks are formed through the …
3Geology of the Falkland Islands — The geology of the Falkland Islands has its origins in events of more than 400 million years bp, before the Falkland Islands existed as separate entities, with the appearance of intruded dikes in the crust of the supercontinent Gondwana. The… …
4Graptolite — Taxobox name = Graptolites fossil range = fossil range|510|350Mid Cambrian to Lower Carboniferous image width = 260px image caption = Fossil graptolite Tetragraptus fruticosus from the Ordovician of Australia regnum = Animalia phylum =… …
5Graptolithinia — Graptolites Temporal range: Mid Cambrian to Lower Carboniferous510–350 Ma …
6Geology of New Jersey — The Geology of New Jersey consists of four distinct physiographic provinces. They are: (listed from the south to the north) the Atlantic Coastal Plain Province, the Piedmont Province, the Highlands Province, and the Ridge and Valley… …
7Medicine Rocks State Park — IUCN Category V (Protected Landscape/Seascape) Medicine Rocks State Park …
8Precambrian time — Interval of geologic time from с 3. 8 billion years ago, the age of the oldest known rocks, to 544 million years ago, the beginning of the Cambrian Period. This interval represents more than 80% of the geologic record and thus provides important… …
9geology — /jee ol euh jee/, n., pl. geologies. 1. the science that deals with the dynamics and physical history of the earth, the rocks of which it is composed, and the physical, chemical, and biological changes that the earth has undergone or is… …
10mountain — mountainless, adj. /mown tn/, n. 1. a natural elevation of the earth s surface rising more or less abruptly to a summit, and attaining an altitude greater than that of a hill, usually greater than 2000 ft. (610 m). 2. a large mass of something… …
