Now_and_Then When you first find a fossil it is sometimes hard to tell what kind of animal it belonged to. It is usually just a part of the original animal. In this section you will find pictures of various fossils that you too may some day discover. Just click on the picture and not only will you see a larger photo of the fossil but you will also see what the original animal may have looked like millions of years ago!! Future of the Earth Conjectured illustration of the scorched Earth after the Sun has entered the red giant phase, 7 billion years from now. During the next four billion years, the luminosity of the Sun will steadily increase, resulting in a rise in the solar radiation reaching the Earth. This will cause a higher rate of weathering of silicate minerals, which will cause a decrease in the level of carbon dioxide in the atmosphere.
The Paleontology Portal Societies and Clubs (showing 1 of 1 listings) KYANA Geological Society - Louisville, Kentucky: We are a non-profit educational organization, which was founded in 1961, to promote the interests of geology, minerals, fossils, and lapidary arts in Kentucky and Southern Indiana. Top of ListMuseums (showing 2 of 2 listings) Wegener's Puzzling Evidence Exercise (6th Grade) Although Alfred Wegener was not the first to suggest that continents have moved about the Earth, his presentation of carefully compiled evidence for continental drift inspired decades of scientific debate. Wegener's evidence, in concert with compelling evidence provided by post World War II technology, eventually led to universal acceptance of the theory of Plate Tectonics in the scientific community. The following files are needed for this exercise and can be downloaded in pdf format (Teacher Overview, (For Teachers) Wegener's Key to Continental Positions for grade 6, Student Puzzle Pieces, Key to Wegener's Evidence sheet, and Student Map of the World Today). If students need additional hints beyond those provided below, there is a Puzzle Outline Hint to be used as a base for the puzzle. Objectives Students will observe and analyze scientific evidence used by Wegener.
Holocene extinction The dodo, a flightless bird of Mauritius, became extinct during the mid-late seventeenth century after humans destroyed the forests where the birds made their homes and introduced mammals that ate their eggs. The Holocene extinction includes the disappearance of large mammals known as megafauna, starting between 9,000 and 13,000 years ago, the end of the last Ice Age. This may have been due to the extinction of the mammoth that had maintained grasslands that became birch forests without the mammoths. The new forest and the resulting forest fires may have induced climate change. Such disappearances might be the result of the proliferation of modern humans which led to climate change. These extinctions, occurring near the Pleistocene–Holocene boundary, are sometimes referred to as the Quaternary extinction event.
Isotopic evidence for long term warmth in the Mesozoic : Scientific Reports Our new brachiopod-derived δ18O isotope data from the Jurassic and Early Cretaceous are consistently more negative than coeval published data14, 15 (Fig. 1). The most likely explanation is that the published data derive from different fossil taxa; the Jurassic and Early Cretaceous portion of the published database is dominated by data derived from belemnites (Cephalopoda, Coleoidea). Studies24, 25, 27 have also shown that belemnites typically display relatively more positive δ18O values than brachiopods; a difference possibly related to a combination of factors. Firstly, belemnites are interpreted as migratory nektobenthic organisms that were hence able to tolerate deeper and cooler waters, just as extant coleoids do28. Secondly, they may not have precipitated their calcite in isotopic equilibrium with seawater25.
Giant Crack in Africa Will Create a New Ocean A 35-mile rift in the desert of Ethiopia will likely become a new ocean eventually, researchers now confirm. The crack, 20 feet wide in spots, opened in 2005 and some geologists believed then that it would spawn a new ocean. But that view was controversial, and the rift had not been well studied. A new study involving an international team of scientists and reported in the journal Geophysical Research Letters finds the processes creating the rift are nearly identical to what goes on at the bottom of oceans, further indication a sea is in the region's future. The same rift activity is slowly parting the Red Sea, too. Using newly gathered seismic data from 2005, researchers reconstructed the event to show the rift tore open along its entire 35-mile length in just days.
Videos - Geology Geology may be a science that moves very slowly, but a number of videos bring the subject to life for students. Education World compiled some great videos that will get kids excited about the topic. For each one, we include a description and grade level. We also note the video’s capacity for engagement (“cool factor”). The Geology and Formation of the Western Land of U.S. Source: World-earthquakes.com. History of the Earth The history of the Earth concerns the development of the planet Earth from its formation to the present day. Nearly all branches of natural science have contributed to the understanding of the main events of the Earth's past. The age of Earth is approximately one-third of the age of the universe. An immense amount of biological and geological change has occurred in that time span. The first life forms appeared between 3.8 and 3.5 billion years ago. The earliest evidences for life on Earth are graphite found to be biogenic in 3.7 billion-year-old metasedimentary rocks discovered in Western Greenland and microbial mat fossils found in 3.48 billion-year-old sandstone discovered in Western Australia. Photosynthetic life appeared around 2 billion years ago, enriching the atmosphere with oxygen. Life remained mostly small and microscopic until about 580 million years ago, when complex multicellular life arose.
Life During the Paleozoic ( Read ) What was early life like? Prehistoric underwater life exploded with amazing new creatures during the Paleozoic Era. Evolution allowed life to take many diverse forms, eventually developing the necessary adaptations to move from the ocean onto land. USGS Schoolyard Geology Download this page as a Microsoft WORD document | Download this page as a PDF Document As a geologist, you need to practice describing rocks in detail. It's not enough just to say "it's a rock".
KIC 12557548 History of detection The existence of the planet was first evidenced in data collected by the Kepler spacecraft. However, the light curve of the star, a graph of its stellar flux versus time, showed that while there were regular drops in stellar flux approximately every 15 hours, the amount of light being blocked covered a wide range, from 0.2% to 1.3% of the starlight being blocked. Rappaport et al. (2012) proposed various possible phenomena which may have caused the anomalies in the light curve, including two planets orbiting each other, and an eclipsing binary orbiting the star in a larger triple-star system. However, the authors found the hypothetical binary planet system to be unstable and the latter scenario to be poorly supported by the data collected by Kepler.
Phanerozoic Earth History Lesson Objectives The Phanerozoic is divided into the Paleozoic, Mesozoic, and Cenozoic. Marine transgressions and regressions were common during the Paleozoic and Mesozoic. Vocabulary facies marine regression marine transgression orogeny Introduction