what important events happened in the precambrian era?
241372
The earth started cooling and the outer edge of the planet solidified from molten lava to a solid crust. Water rained from the atmosphere and created oceans. The first form of life on our planet was created during the Archean eon in these oceans.
740203
Volcanic activity has been a big part of the Earth's history, but only after the Earth's surface cooled to form the crust. Indirectly yes.
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)']
1427113
The Phanerozoic, the eon of visible life, is divided into three major spans of time largely on the basis of characteristic assemblages of life-forms: the Paleozoic (541 million to 252 million years ago), Mesozoic (252 million to 66 million years ago), and Cenozoic (66 million years ago to the present) eras.
980024
The Ordovician Period started at a major extinction event called the Cambrian–Ordovician extinction events about 485.4 ± 1.9 Mya (million years ago), and lasted for about 44.6 million years. It ended with the Ordovician–Silurian extinction event, about 443.4 ± 1.5 Mya (ICS, 2004) that wiped out 60% of marine genera.
996826
These gaps represent periods from which no relevant fossils have been found. ... There has been much debate over why there are so few fossils from this time period. Some scientists have suggested that the geochemistry of the time period caused bad conditions for fossil formation, so few organisms were fossilized.
103967
Currently, we're in the Phanerozoic eon, Cenozoic era, Quaternary period, Holocene epoch and (as mentioned) the Meghalayan age. The IUGS shared an image of the newly named ages in a tweet.
867193
Evidence from fossils, glaciers, and complementary coastlines helps reveal how the plates once fit together. Fossils tell us when and where plants and animals once existed. Some life "rode" on diverging plates, became isolated, and evolved into new species.
133808
['Bronze Age (c.3000 BCE – c.1050 BCE) ... ', 'Iron Age (c.1050 BCE – c.500 CE) ... ', 'Middle Ages (Europe, 476 – 1453) ... ', 'Early modern period (Europe, 1453 – 1789) ... ', 'Long nineteenth century (1789–1914) ... ', 'First, interwar Britain and Second World Wars (1914–1945)', 'Cold War (1945–1991)']
659981
['energy flow and nutrient cycles ( photosynthesis , food webs, decomposition webs)', 'sediment transport and soil formation.', 'the water cycle.', 'reproduction/ regeneration mechanisms.', 'natural disturbances (fires, floods, storms)', 'succession.']
989867
['Coronal hole.', 'Coronal mass ejection.', 'Geomagnetic storm.', 'Solar flare.', 'Solar particle event.', 'Solar prominence.', 'Sunspot.', 'Space Weather.']
972458
The Permian period, which ended in the largest mass extinction the Earth has ever known, began about 299 million years ago. The emerging supercontinent of Pangaea presented severe extremes of climate and environment due to its vast size. The south was cold and arid, with much of the region frozen under ice caps.
133416
The three major eras are the Paleozoic, the Mesozoic, and the Cenozoic. The Cenozoic era is the one we are in today.
1192388
['Formation of Earth - 4600 MY.', 'Oldest rocks yet discovered - 3950 MY.', 'Significant oxygen in atmosphere - 1500 MY.', 'Start of formation of Appalachian Mountains - 450 MY.', 'Start of supercontinent Pangaea (all continents pushed together) - 360 MY.', 'Abundant coal-forming swamps - 320 MY.']
532993
The first known single-celled organisms appeared on Earth about 3.5 billion years ago, roughly a billion years after Earth formed. ... The evolution of multicellular life from simpler, unicellular microbes was a pivotal moment in the history of biology on Earth and has drastically reshaped the planet's ecology.
895097
Physical geology deals with present-day problems, like rock formation, earthquakes, volcanoes, and pollution issues, among others. Historical geology looks at preserved evidence of past geologic events. This includes interpreting fossil records and rock records to better understand events that took place in the past.
741500
Earth formed around 4.54 billion years ago, approximately one-third the age of the universe, by accretion from the solar nebula. Volcanic outgassing probably created the primordial atmosphere and then the ocean, but the early atmosphere contained almost no oxygen.