Sequence stratigraphy is a relatively new branch of geology that attempts to link prehistoric sea-level changes to sedimentary deposits.
The 'sequence' part of the name refers to cyclic sedimentary ... > more
Limestone is a sedimentary rock composed largely of the mineral calcite (calcium carbonate: CaCO3). Limestones often contain variable amounts of silica in the form of chert or flint, as well as ... > more
Rhodesian Man (Homo rhodesiensis) is a hominin fossil that was described from a cranium found in an iron and zinc mine in Northern Rhodesia (now Kabwe, Zambia) in 1921 by Tom Zwiglaar, a Swiss miner. ... > more
Cave or rock paintings are paintings painted on cave or rock walls and ceilings, usually dating to prehistoric times. Rock paintings have been made since the Upper Paleolithic, 40,000 years ago. They ... > more
The Neanderthal or Neandertal was a species of Homo (Homo (sapiens) neanderthalensis) that inhabited Europe and parts of western Asia from about 230,000 to 29,000 years ago, during the Middle ... > more
The Little Ice Age (LIA) was a period of cooling lasting approximately from the 14th to the mid-19th centuries, although there is no generally agreed start or end date: some confine the period to ... > more
A trebuchet, also sometimes called a trebucket is a medieval siege engine, a weapon employed either to batter masonry or to throw projectiles over walls. The invention of the trebuchet derives, no ... > more
A stalagmite is a type of speleothem that rises from the floor of a limestone cave due to the dripping of mineralized solutions and the deposition of calcium carbonate.
The corresponding formation ... > more
Peking Man (sometimes now called Beijing Man), also called Sinanthropus pekinensis (currently Homo erectus pekinensis), is an example of Homo erectus. The remains were first discovered in 1923-27 ... > more
The Paleozoic Era is a major division of the geologic timescale, one of four geologic eras. The Paleozoic includes six geologic periods; from oldest to youngest -- the Cambrian, Ordovician, Silurian, ... > more