What does the Pycnocline separate?
Regional Specificspycnocline, in oceanography, boundary separating two liquid layers of different densities. In oceans a large density difference between surface waters (or upper 100 metres [330 feet]) and deep ocean water effectively prevents vertical currents; the one exception is in polar regions where pycnocline is absent. Why is the pycnocline important to plankton? Below the mixed
What ended the Phanerozoic eon?
Regional SpecificsWhat happened Phanerozoic eon? The time span of the Phanerozoic starts with the sudden appearance of fossilized evidence of a number of animal phyla; the evolution of those phyla into diverse forms; the emergence and development of complex plants; the evolution of fish; the emergence of insects and tetrapods; and the development of modern fauna.
How big are the crystals in the Cave of Crystals?
Regional Specifics36 feetup to 36 feet (11 meters) long and weighing up to 55 tons. “It’s a natural marvel,” said García-Ruiz, of the University of Granada in Spain. How old are the crystals in the Cave of Crystals? about 500,000 years Stein-Erik Lauritzen (University of Bergen, Norway) performed uranium-thorium dating to determine the maximum age of
What safety equipment do volcanologists use in their work?
Regional SpecificsMost of the time when they work on a volcano, they just wear a pair of heavy boots, jeans, hat, and long-sleeved shirt to protect from sharp dried lava. They might use heavy work gloves if they are working on fresh lava flows and a rock-climbing helmet if working in an area where there is
What are fragments that make up rocks?
Regional SpecificsTextures are fragments that make up rocks. Nonfoliated metamorphic rocks form distinct, parallel layers. What are rocks called that are made of the fragments of other rocks? Clastic sedimentary rocks Clastic sedimentary rocks are composed of rock fragments (clasts) that have been cemented together. What are small fragments of rocks called? Sedimentary rocks are made
What kind of animals are in the Appalachian Mountains?
Regional SpecificsThe wildlife a person might encounter in the Appalachian Mountains includes a wide variety of animals: Mammals (moose, white-tailed deer, black bears, beaver, chipmunks, rabbits, squirrels, foxes, raccoons, opossums, skunks, groundhogs, porcupines, bats, weasels, shrews, and minks) What are the creatures that live in the Appalachian Mountains? Scattered through other areas are the black bear,