Meganeura is a genus of extinct insects from the Carboniferous period, which resembled and are related to the present day dragonflies. Meganeura were predatory, and fed on other insects, and even small amphibians. Carboniferous is the fifth period of the
Meganeura is a genus of extinct insects from the Carboniferous period, which resembled and are related to the present day dragonflies. Meganeura were predatory, and fed on other insects, and even small amphibians. Carboniferous is the fifth period of the Paleozoic Era. It spanned from about 355 million years to about 295 million years ago. The rocks that formed during this time interval are known as the Carboniferous System; they include a wide variety of sedimentary, igneous, and metamorphic rocks. Sedimentary rocks in the lower portion of the Carboniferous are typically carbonates, such as limestones and dolostones, and locally some evaporites. The upper portions of the system are usually composed of cyclically repeated successions of sandstones, coals, shales, and thin limestones. The economic importance of the Carboniferous is evident in its name, which refers to coal, the important energy source that fueled the industrialization of northwestern Europe in the early 1800s and led to the Carboniferous being one of the first geologic systems to be studied in detail. The Pennsylvanian is, in the ICS geologic timescale, the younger of two sub-periods (or upper of two subsystems) of the Carboniferous Period. It lasted from roughly 323 to 298 million years ago. The rock beds that define the Pennsylvanian are well identified, but the exact date of the start and end are uncertain by a few million years. The Pennsylvanian is named after the American state of Pennsylvania, where the coal productive beds of this age are widespread.
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