== == The Carboniferous Period occurred from about 354 to 290 million years ago during the late Paleozoic Era. The term "Carboniferous" comes from England, in reference to the rich deposits of coal that occur there. These deposits of coal occur throughout northern Europe, Asia, and midwestern and eastern North America. The term "Carboniferous" is used throughout the world to describe this period, although this period has been separated into the Mississippian (Lower Carboniferous) and the Pennsylvanian (Upper Carboniferous) in the United States. This system was adopted to distinguish the coal-bearing layers of the Pennsylvanian from the mostly limestone Mississippian, and is a result of differing stratigraphy on the different continents. ---- Carboniferous Forest : The Carboniferous Period is famous for its vast coal swamps, such as the one depicted here. Such swamps produced the coal from which the term "Carboniferous", or "carbon-bearing" comes. ---- In addition to having the ideal conditions for the beginnings of coal, several major biological, geological, and climatic events occurred during this time. One of the greatest evolutionary innovations of the Carboniferous was the amniote egg, which allowed for the further exploitation of the land by certain tetrapods. The amniote egg allowed the ancestors of birds, mammals, and reptiles to reproduce on land by preventing the desiccation of the embryo inside. There was also a trend towards mild temperatures during theCarboniferous, as evidenced by the decrease in lycopods and large insects and an increase in the number of tree ferns. Geologically, the Late Carboniferous collision of Laurussia (present-day Europe and North America) into Godwanaland (present-day Africa and South America) produced the Appalachian mountain belt of eastern North America and the Hercynian Mountains in the United Kingdom. A further collision of Siberia and eastern Europe created the Ural Mountains. The stratigraphy of the Lower Carboniferous can be easilydistinguished from that of the Upper Carboniferous. The environment of the Lower Carboniferous in North America was heavily marine, when seas covered parts of the continents. As a result, most of the mineral found in Lower Carboniferous is limestone, which are composed of the remains of crinoids, lime-encrusted green algae, or calcium carbonate shaped by waves. The North American Upper Carboniferous environment was alternately terrestrialand marine, with the transgression and regression of the seas caused by glaciation. These environmental conditions, with the vast amount of plant material provided by the extensive coal forests, allowed for the production of coal. Plant material did not decay when the seas covered them and pressure and heat eventually built up over the millions of years to transform the plant material to coal. ---- ---- Subdivisions of the
Carboniferous: The chart at left shows the major subdivisions of the Carboniferous Period.The Lower Carboniferous of Europe corresponds roughly to the Mississippian of North America, and the Middle and Upper Carboniferous are roughly equivalent to the Pennsylvanian. This chart is mapped, to allow you to travel back to the Devonian orforward to the Permian. The Carboniferous Period is part of thePaleozoic Era. ----
Reptiles evolved from a group of reptiliomorph amphibians in the Carboniferous period. Mammals evolved from a groupof synapsidreptiles in the Jurassic period.
Precambrian is a geologic period that extends as back as 4.500 million years ago. Fossils are very rare from that period of time.
Varves are a pair of thin layers of clay and silt of cnotrasting color and texture
cretaceous, i think. certainly archaeopteryx moggerfrog
most geological events occurs where there is active plate tectonic events
Athyris was a genus of brachiopods that existed during the Carboniferous Period, specifically in the Mississippian and Pennsylvanian epochs. This places Athyris in the geologic ages of the Carboniferous Period, which lasted from approximately 359 to 299 million years ago.
The Carboniferous is a geologic period lasting from about 358.9 million to 298.9 million years ago. It was characterized by the widespread formation of coal deposits, giving rise to its name. The Carboniferous also saw the first appearance of terrestrial vertebrates and the diversification of early amphibians.
the carboniferous period is when dead plants were compressed and made into coal
there was plate tectonic movement
Most geologic periods are named for the location where rock formations were first found that contained fossils from that period, some others (e.g. Carboniferous) were named for materials associated with the fossils.
Carboniferous means carbon bearing. Large coal deposits were laid down then, hence the name.
The existence and extinction of the dinosaurs.
beause amphibians were the top species during the Carboniferous Period
The Mont Blanc dates back to the Carboniferous, a geologic period and system that extends from about 360 million years ago, to about 300 million years ago.
The Carboniferous period is subdivided into the Mississippian and the Pennsylvanian periods.
the carboniferous period had crinoids,echinoderms but today we don't have it
The Carboniferous is considered to have started 354 million years ago and ended 290 million years ago.