What is the definition of the landform mountain?
GeologyWhat is a mountain in landform? Most geologists classify a mountain as a landform that rises at least 1,000 feet (300 meters) or more above its surrounding area. A mountain range is a series or chain of mountains that are close together. What is a simple definition of a mountain? mountain, landform that rises prominently
What does aa lava mean?
GeologyWhat does aa mean in lava? ‘A’ā (pronounced “ah-ah”) is a Hawaiian term for lava flows that have a rough rubbly surface composed of broken lava blocks called clinkers. The incredibly spiny surface of a solidified ‘A’ā flow makes walking very difficult and slow. What is aa and pahoehoe lava? Pahoehoe is lava that in
Are there earthquakes in Denver?
GeologyEach time an earthquake occurs in Colorado, the news media and public asks, “Does Colorado have earthquakes?” Short answer: Yes! In comparison with California, Nevada, and Utah, major earthquakes here are infrequent. When was the last earthquake in Denver? The last quake felt in Denver was a magnitude-4.2 temblor on Christmas Day 1994. How often
What does paleomagnetism tell us about Earth’s past?
GeologyThe record of the strength and direction of Earth’s magnetic field (paleomagnetism, or fossil magnetism) is an important source of our knowledge about the Earth’s evolution throughout the entire geological history. This record is preserved by many rocks from the time of their formation. What is paleomagnetism How does this help scientists understand the history
What does seismic activity mean?
GeologyWhat seismic activity means? Seismic activity is defined as the types, frequency and size of earthquakes that happen over a period of time in a certain area. An example of seismic activity is how often earthquakes occur in the San Francisco Bay Area. noun. What is an example of seismic? The definition of seismic is
How are foliated metamorphic rocks classified?
GeologyMetamorphic rocks are broadly classified as foliated or non-foliated. Non-foliated metamorphic rocks do not have aligned mineral crystals. Non-foliated rocks form when pressure is uniform, or near the surface where pressure is very low. How do you classify foliated metamorphic rocks? The various types of foliated metamorphic rocks, listed in order of the grade or
What is active and passive recreation?
GeologyActive recreation: An activity that requires a considerable expenditure of energy – e.g: cycling. Passive recreation: Involves little exertion, but is generally sustained – for example, reading and fishing. What is an active recreation? Active recreation is leisure time physical activity undertaken outside of structured, competition sport. It is a set of activities within the
What ended the Phanerozoic eon?
GeologyWhat 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.
Why is the inner core of the Earth solid and not liquid?
GeologyThe inner core is solid because it is made of very dense, or heavy, materials – like iron and nickel. Even though it is very hot, these materials don’t “melt” very easily, so they stay solid. Why is the inner core a solid and not a liquid? However, unlike the outer core, the inner core
What does the Pycnocline separate?
Geologypycnocline, 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