When was the Glossopteris extinct?
GeologyThe Glossopteridales arose in the Southern Hemisphere around the beginning of the Permian Period (298.9 million years ago), but became extinct during the end-Permian (Changhsingian) mass extinction. How long did the Glossopteris live? Glossopteris, genus of fossilized woody plants known from rocks that have been dated to the Permian and Triassic periods (roughly million years
How is the water on earth split up?
GeologyTo break the numbers down, 96.5% of all the Earth’s water is contained within the oceans as salt water, while the remaining 3.5% is freshwater lakes and frozen water locked up in glaciers and the polar ice caps. Of that fresh water, almost all of it takes the form of ice: 69% of it, to
What type of plate boundary is associated with basalt igneous rock?
GeologyConvergent plate boundaries What plate boundary does igneous rock form? Metamorphic rocks that form because they are exposed to heat from magma form at the same plate boundaries igneous rocks form: divergent, ocean–ocean convergent, and ocean–continent convergent boundaries. What plate is composed of basalt rocks? Earth. Basalt is the most common volcanic rock type on
Are bryozoans multicellular?
GeologyMulticellular Animals Bryozoans are composed of many individual zooids, each of which is approximately tubular and has a crown of tentacles (Figs. 10.9A–10.9D). This group actually includes two distantly related phyla, the Entoprocta (Fig. Is a bryozoan a modular organism? As modular organisms, bryozoans can be analysed at two different hierarchical levels: the colony as
Why did Gondwanaland break up?
GeologyAccording to plate tectonic evidence, Gondwana was assembled by continental collisions in the Late Precambrian (about 1 billion to 542 million years ago). Gondwana then collided with North America, Europe, and Siberia to form the supercontinent of Pangea. The breakup of Gondwana occurred in stages. What caused Gondwanaland to break up? The powerful tectonic forces
What is the Colorado stone?
GeologyThe official state gemstone is aquamarine, a beautiful blue mineral mostly found around the 13,000-foot level on Mount Antero. Gemstone quality rhodochrosite, the state mineral, is produced from the Sweet Home Mine located in Alma mining district, Park County. Do they still mine Marble in Marble Colorado? It was discovered in the 1870s in the
How do you measure earthquake intensity?
GeologyThe Richter scale measures the largest wiggle (amplitude) on the recording, but other magnitude scales measure different parts of the earthquake. The USGS currently reports earthquake magnitudes using the Moment Magnitude scale, though many other magnitudes are calculated for research and comparison purposes. How do we measure intensity of earthquake? The Richter scale measures the
What level does fossil Pokemon evolve?
GeologyThey all evolve at Level 40 with the exception of Cranidos and Shieldon, which evolve at Level 30, then Archen and Tirtouga, which evolve at Level 37, and Aerodactyl, who does not evolve at all. In Generation IV, addtional Fossils can be also found in the Underground or Ruins of Alph. Can you evolve fossil
What is the density of oceanic crust?
Geology3.0 g/cm33.0 g/cm3, while continental crust has an average of 2.7 g/cm3. Is oceanic crust high density? Oceanic crust is more dense because it contains basalt which is more dense than granite which composes the continental crust. … Subduction is when one plate is forced below the other due to its higher density. What is
How do I make my porcelain sink hole wider?
GeologyYou can use one of two methods to make the hole wider in a porcelain sink. You can use a grinder to wear down the porcelain, or you can use a diamond grit hole saw to cut a new hole. The hole saw is definitely faster, but it’s a little riskier because it generates more