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  Encyclopedia of Keywords > Places > Earth > Continents > Million Years   Michael Charnine

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  1. Ten million years is a short time by evolution standards but African Cichlids have already adapted to living with less salt in their water.
  2. Within a few million years, the lithosphere may rupture and eastern Africa will split off to form a new landmass.
  3. Sixty-five million years, the look of prehistoric animals had a dramatic change, when dinosaurs disappeared from the earth.
  4. After 300 million years, the three landmasses separated for about 400 million years, then came back together in a new configuration, Pangea.

Big Bang

  1. The objects seen here formed approximately 500 million years after the Big Bang; in a 14 billion year old universe, that's pretty young.

Hundred Million Years

  1. Two hundred million years ago, all of the continents on Earth were joined in one large supercontinent scientists call Pangaea.
  2. Eight hundred million years ago, during the Neoproterozoic Era, Earth underwent a monstrous ice age.
  3. In these areas, complex sequences of mountain building (orogeny) events have been documented over the past few hundred million years.

Volcanic Eruptions

  1. A few volcanic eruptions have occurred in the Chilcotin Group in the past 1.6 million years.

Sea Level

  1. At an altitude of 596.9 meters above the sea level, the lake was formed when volcanic magma erupted over 3 million years ago.
  2. Around 71 million years ago and again four million years later, there were two intervals worldwide where sea level was particularly low.


  1. Some mutualistic associations between farmer insects and farmed fungi have been established for more than 50 million years.


  1. It relates to Robert Broom's opinion that not a single new genus has appeared in the last two million years.
  2. The genus is estimated to be between 1.5 and 2.5 million years old.


  1. Dolphins have had their current torpedolike, streamlined shape for about five million years.

Yellowstone Caldera

  1. Geologists estimate that 2 million years ago a cataclysmic series of volcanic eruptions in the Yellowstone Caldera was 2,500 times more powerful than the Mt.


  1. In addition there have been a few eruptions in the Pleistocene (0.01 to 1.6 million years ago).


  1. HISTORY Hominid bones discovered in eastern Ethiopia dating back 4.4 million years make Ethiopia one of the earliest known locations of human ancestors.
  2. One of its most famous residents is Lucy, a proto-human skull discovered in Ethiopia in 1974 and believed to be 3.5 million years old.


  1. True spiders (thin-waisted arachnids) evolved about 400 million years ago, and were among the first species to live on land.
  2. Deep canyons and steep slopes show that erosion has been very effective in wearing down the land during the last two million years.

Late Paleocene

  1. The perissodactyls originally arose in the late Paleocene, less than 10 million years after the Cretaceous-Tertiary extinction event.


  1. Died out 20 million years ago 27.5 MYA Indricothere, rhino relative, 4.5 m tall, tallest mammal on land, lives in Mongolia.


  1. Today, after 500 million years of evolution, the array concept is still the most appropriate solution for insects and crustaceans.
  2. Fossils show early whales became agile swimmers in a mere blink of evolution - about 10 million years.


  1. The gently rolling hills of the Sierra de Atapuerca in Spain hold many limestone caves used by humans for almost one million years.
  2. However fossils do show that humans evolved from bipedal chimpanzee-like creatures about 5 million years ago.
  3. Rocks have been used by humans and other hominids for more than 2 million years.

Astronomical Terms

  1. In astronomical terms, 1,000 million years.

Solar System

  1. The Solar System has been travelling through the Local Bubble for the last 3 million years.


  1. Andesite lava flows half a million to a million years old are the most abundant rock type in the area, with a total flow thickness of over 1 km (1 mi).
  2. Mount Rainier is an active volcano that first erupted about half a million years ago.
  3. See a full-size replica of Gigantopithecus, the largest primate ever (up to 10 feet tall!) that became extinct about half a million years ago.


  1. Scientists believe Iceland rose from the sea floor about 20 million years ago.
  2. Scientists say the evidence, if correct, points to a space rock some 5km across having crashed into the Ross Sea about three million years ago.


  1. It was so big, the eruption itself is thought to have lasted 6 million years.
  2. This eruption is believed to have been the largest anywhere on Earth in the last 25 million years.
  3. The first eruptive phase started about four million years ago with the eruption of dacite lava flows and pyroclastic rock.


  1. Until the late Pliocene (~2.5 million years ago), what is now Kamchatka was little more than a pool of magma waiting beneath the floor of the Pacific Ocean.
  2. The known volcanic history of the Long Valley Caldera area started several million years ago when magma began to collect several miles below the surface.

Relatively Young

  1. McLoughlin is a relatively young, composite volcano that first began to build up less than a million years ago.
  2. Dr Kakula says that these are relatively young stars, only a couple of million years old, and are a brilliant blue colour.


  1. Bathed in gas and dust the cluster formed in a huge rush of star formation thought to have occurred around a million years ago.
  2. Many bright stars are visible from NGC 6530, an open cluster that formed in the nebula only several million years ago.
  3. Maybe in a few hundred million years, there will be planets like the Earth forming around some of the new stars in the cluster.


  1. Fossilized remains of the earliest ancestors to the human species, discovered in Ethiopia, have been assigned dates as long ago as 5.9 million years.
  2. It dates between 9 and 10 million years old, and it has been questioned if it indeed belongs in the genus.
  3. KNM ER 1813 is a relatively complete cranium which dates 1.9 million years old, discovered at Koobi Fora, Kenya by Kamoya Kimeu in 1973.


  1. The sedimentary rocks on this island are reputed to be among the oldest in Malaysia going back 500 million years.
  2. The family Physeteridae is about 30 million years old and among the oldest of living families of whales and dolphins.
  3. Smaller formations of Lewisian gneiss in the north west are up to 3,000 million years old and amongst the oldest found anywhere on Earth.


  1. These lava flows occurred 6.4 million years ago, and were the last volcanic events on the island, which has subsequently eroded to what remains today.
  2. Smith (1987) estimates that about 270 cubic kilometers of lava was erupted from Mount Rainier in the last 1 million years.
  3. Approximately 270 cubic kilometers of lava have been erupted from Mount Rainier in the past one million years.


  1. Kilimanjaro is a giant stratovolcano that began forming a million years ago, when lava spilled from the Rift Valley zone.
  2. Over the next several million years, this giant southern continent proceeded to break up, forming the continents we know today.


  1. By 1 million years ago, the earliest evidence of humans in Europe is known, as well use of the more advanced handaxe tool.
  2. The oldest traces of human habitation in southern France are, however, almost 2 million years old, when the first African migration entered Europe.


  1. By about 2 million years ago, at the beginning of a time called the Pleistocene Epoch, ice had accumulated on other continents as well.
  2. Since the beginning of the Ice Age, 2.4 million years ago, the uplands of North Wales have been subject to several phases of glaciation.
  3. Figure 20–14 The San Andreas fault developed where western North America overran the East Pacific rise, beginning 30 million years ago.


  1. Volcanic rocks a few hundred miles to the east date this horizon at 543 (plus or minus one) million years before the present.
  2. This animal is descended from the filter-feeding whales that developed at the beginning of the Oligocene, over 30 million years before the present.
  3. We now present the first definitive evidence of ancient nurseries for C. megalodon from the late Miocene of Panama, about 10 million years ago.


  1. The volcanic field was formed by eruptions along a 100-kilometer, north-south vent system over the past 5 million years.
  2. In particular, the tilting of the Great Valley rocks along the eastern side of the Coast Ranges probably began within the past one to three million years.
  3. For instance, many times over the past few million years, the continents of Eurasia and America were connected by dry land.


  1. The family Delphinidae is the largest in the Cetacea, and relatively recent: dolphins evolved about 10 million years ago, during the Miocene period.
  2. The family Delphinidae is the largest in the Cetacea, and relatively recent: dolphins evolved about ten million years ago, during the Miocene.


  1. Cetaceans evolved from land mammals that adapted to marine life about 50 million years ago.
  2. It died out 14 million years ago (cetaceans are about 50 million years old).


  1. While most galaxies are very old, some are younger and a small fraction may even have started forming in the last few hundred million years.
  2. The most distant galaxies are seen as they were a few hundred million years after the big bang, and show surprising similarities to the galaxies of today.


  1. Our team has tracked the formation of an extinct but important body of water, the Rheic Ocean, which came into being about 500 million years ago.
  2. The Precambrian eon spans from the formation of Earth around 4500 Ma (million years ago) to circa 542 Ma.
  3. The islands are actually a series of volcanoes whose formation began around 8 million years ago.


  1. Hundreds of species of ancient creepy-crawly are known to paleontologists only because they blundered into a blob of resin many million years ago.
  2. More recently, discoveries in the Tugen Hills dated to approximately 6 million years ago precipitated the naming of a new species, Orrorin tugenensis.
  3. Sixty-five million years ago nearly 75-80% of all species of life on Earth were wiped out in an incredibly short period of time.

Baleen Whales

  1. Janjucetus hunderi lived between 25 and 9 million years ago after the last common ancestor of the toothed and baleen whales.
  2. According to the Sea World website, baleen whales appeared approximately 30 million years ago.


  1. After about 10 million years, the final stage of subduction begins.


  1. Yellowstone Caldera which occupies most of Yellowstone National Park, is actually the third caldera to form in the area within the past 2 million years.
  2. Gondolo says black holes existed only a few hundred million years after the big bang, yet current theories say they took longer to form.
  3. According to de Buffon's unpublished manuscript, he actually believed that the sedimentary rocks probably took at least three million years to form.


  1. Some 50 million years ago the first whales appeared, evolving from a land animal that moved into the oceans (perhaps for protection or to find more food).
  2. The oceans would flood the land, and any mountain belts would be worn away in a few hundred million years.


  1. Hence starburst activity usually lasts for only about ten million years, a relatively brief period in the history of a galaxy.
  2. One galaxy called "I Zwicky 18" was recently discovered to be a very young galaxy that began forming stars only 500 million years ago.

Milky Way

  1. Several large stars within the Milky Way have been suggested as possible supernovae within the next million years.
  2. Several large stars within the Milky Way have been suggested as possible supernovae within the next hundred million years.


  1. He said the huge continent had split more than two hundred million years ago.

Rift Valley

  1. Half a million years ago, the Rift Valley was likely more moist and wooded than it is today.
  2. It is a rift valley that was formed when Australia separated from Antarctica between 60 and 50 million years ago.
  3. It provided evidence that hominids began to evolve in the Rift Valley some three million years ago.


  1. It is thought that the Milky Way undergoes a starburst of this sort every 500 million years.
  2. Geologists had previously thought the major activity that formed the Santa Catalina and Rincon mountains had occurred 20 million years ago or earlier.
  3. It is an ancient extinct volcano, during whose period of activity (3.1–2.6 million years ago) it is thought to have risen to 6,500 m.


  1. The palladium isotope 107 Pd decays by beta emission to 107 Ag with a half-life of 6.5 million years.


  1. Encyclopedia of Keywords > Places > Earth > Continents
  2. Extinct
  3. Places > Earth > Geology > Dinosaurs
  4. Life > Death > Extinction > Fossils
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