what major events happened during the devonian period?
315559
The first tetrapods — land-living vertebrates — appeared during the Devonian, as did the first terrestrial arthropods, including wingless insects and the earliest arachnids. In the oceans, brachiopods flourished. Crinoids and other echinoderms, tabulate and rugose corals, and ammonites were also common.
870736
Fossil records indicate that nautiloids have not evolved much during the last 500 million years. Many were initially straight-shelled, as in the extinct genus Lituites. They developed in the Late Cambrian period and became a significant group of sea predators during the Ordovician period.
320009
['1400 to 1450: The Rise of Rome and the de Medici Family. Danita Delimont / Getty Images. ... ', '1451 to 1475: Leonardo da Vinci and the Gutenberg Bible. Chris Hellier / Getty Images. ... ', '1476 to 1500: The Age of Exploration. ... ', '1501 to 1550: Politics and the Reformation. ... ', '1550 and Beyond: The Peace of Augsburg.']
1035817
Eons are made up of eras, divisions that span time periods of tens to hundreds of millions of years. The three major eras are the Paleozoic, the Mesozoic, and the Cenozoic. The Cenozoic era is the one we are in today.
766008
['January 01, 985. People. Bjarni Sights America. ... ', 'April 02, 1534. People. Cartier Reaches Labrador. ... ', 'January 15, 1540. Government and Politics. Roberval Made Viceroy. ... ', 'August 05, 1583. Disasters Government and Politics. ... ', 'July 05, 1610. People. ... ', 'November 13, 1637. Government and Politics. ... ', 'September 09, 1775. Disasters. ... ', 'June 01, 1800. People.']
139752
Three of the five largest mass extinctions in Earth history are associated with the Mesozoic: a mass extinction occurred at the boundary between the Mesozoic and the preceding Paleozoic; another occurred within the Mesozoic at the end of the Triassic Period; and a third occurred at the boundary between the Mesozoic and ...
8154
['Beginning of Mycenaean Period (1600 BC–1100 BC) ... ', 'The Trojan War (1250 BC) ... ', 'Introduction of the Olympic Games (776 BC) ... ', 'The Rise of the Greek Tyrants (650 BC) ... ', 'Coin Currency Introduced (600 BC) ... ', 'Age of Pericles (445 BC–429 BC) ... ', 'Second Peloponnesian War: Athens versus Sparta (431 BC) ... ', 'Bubonic Plague in Athens (430 BC)']
1064052
['Irish Potato Famine. ... ', 'Communist Manifesto Published. ... ', 'Great Exhibition. ... ', 'Crimean War. ... ', 'Bessemer Invents Blast Furnace. ... ', 'Big Ben Cast. ... ', 'British East India Company Transfers Control of India to Crown. ... ', 'First Transatlantic Cable.']
1022154
The Jurassic Period was the second segment of the Mesozoic Era. It occurred from 199.6 to 145.5 million years ago, following the Triassic Period and preceding the Cretaceous Period. During the Jurassic Period, the supercontinent Pangaea split apart.
1309941
Some 180 million years ago, in the Jurassic Period, the western half of Gondwana (Africa and South America) separated from the eastern half (Madagascar, India, Australia, and Antarctica). The South Atlantic Ocean opened about 140 million years ago as Africa separated from South America.
322819
['1860s–1890s: The Khodynka Tragedy.', '1900–1916: 1905 Revolution and Bloody Sunday | Outbreak of First World War.', '1917: February Revolution | June Offensive | July Days | October Revolution | Kornilov affair.', '1918–1924: Brest-Litovsk Treaty.']
509273
The extinction that occurred 65 million years ago wiped out some 50 percent of plants and animals. The event is so striking that it signals a major turning point in Earth's history, marking the end of the geologic period known as the Cretaceous and the beginning of the Tertiary period.
837600
['Tectonic changes – Earthquakes can cause uplift along fault lines to create fault scarps several metres high. ... ', 'Fall in sea level caused by eustatic changes – during a glacial period, water is stored on land as ice so the sea level changes.']
1203687
['origin of plants from algae.', 'evolution of vascular tissue.', 'evolution of seeds.', 'evolution of.', '475 million years ago. The carboniferous was dominated. ... ', '354 to 290 mya. The Cretaceous was dominated by conifers and also saw the advent of the flowering plants. ... ', '144 to 65 mya.', '23.8 to 5.3 mya.']
322743
The story of the Fundy Basin begins about 200 million years ago in the early Jurassic, when all land on earth was part of a supercontinent called Pangaea.
120369
During the Carboniferous many new groups of plants evolved and great forests grew in the tropical swamps and deltas. Trees were not like those we know today, but mainly clubmosses and horsetails, and the earliest gymnosperms (seed-bearing plants) like conifers and seed ferns also developed.
1364432
The Cretaceous period 145-66 million years ago was a period for active kimberlite volcanism in the Western Canadian Sedimentary Basin of Alberta and Saskatchewan. The Fort à la Corne kimberlite field in central Saskatchewan formed 104 to 95 million years ago during the Early Cretaceous.