on April 16, 2022
Why are transitional fossils important?
GeologyA transitional fossil may be defined as a fossil which exhibits traits common to both ancestral and derived groups. This is especially important when groups are sharply differentiated. They can show how a species might adapt to survive their new conditions. Why are transitional fossils important in evolution? Transitional fossils help scientists bridge gaps in
on April 16, 2022
What is a biozone in geology?
Geologybiozone, stratigraphic unit consisting of all the strata containing a particular fossil and, hence, deposited during its existence. The extent of the unit in a particular place, on the local stratigraphic range of the fossil plant or animal involved, is called a teilzone. What is the purpose of biozones? Biostratigraphy is the branch of stratigraphy
on April 16, 2022
What can fossils tell us about extinct animals?
GeologySome animals and plant are only known to us as fossils. By studying the fossil record we can tell how long life has existed on Earth, and how different plants and animals are related to each other. Often we can work out how and where they lived, and use this information to find out about
on April 16, 2022
What forms when iron rich minerals in cooling lava align with the direction of Earth’s magnetic field?
GeologyWhat form when iron rich minerals in cooling lava align with the direction of Earth’s magnetic field? Iron rich minerals in the lava are magnetic. As the lava cools to form basalt, these minerals align with the direction of Earth’s magnetic field. Once hardened the basalt provides a permanent record of Earth’s magnetic field at
on April 16, 2022
Is Lassen volcano still active?
GeologyA: No one can say for sure or when. However, Lassen Peak is considered active because it last erupted about 100 years ago (read more). Geologically recent volcanic activity in an area is the best guide to forecasting future eruptions. What would happen if Lassen Peak erupted? When Lassen erupted from 1914 to 1917, very
on April 16, 2022
How did the compositional layers of the Earth develop?
GeologyThe major layers of the Earth, starting from its center, are the inner core, the outer core, the mantle, and the crust. These layers formed as the building blocks of Earth, known as planetesimals, collided and collapsed under their own gravity around 4.5 billion years ago. How did the layers of the Earth develop? Basically
on April 16, 2022
What is a landscape region?
GeologyWhat is a landscape region? A region on earth’s surface in which physical features such. as hills, valleys, and streams are related by common origin. What is an example of a landscape region? Mountains, plateaus and plains identify landscape regions. What are the 3 landscape regions? Most landscape regions can be classified as plains, plateaus,
on April 16, 2022
Which is the point vertically above the focus on surface of the earth?
GeologyThe epicenter is the point on the earth’s surface vertically above the hypocenter (or focus), point in the crust where a seismic rupture begins. What is the point vertically above the force called? The epicenter of an earthquake is the point on the earth’s surface vertically above the focus. What is called the point on
on April 16, 2022
How do we know that the outer core is liquid?
GeologyBy tracking seismic waves, scientists have learned what makes up the planet’s interior. P-waves slow down at the mantle core boundary, so we know the outer core is less rigid than the mantle. S-waves disappear at the mantle core boundary, so the outer core is liquid. What keeps the inner core be in a solid
on April 16, 2022
What is the origin of most hydrothermal solutions?
GeologyThe sources of the water making up hydrothermal solutions are varied, and may include (Figure H7): (1) water that was recently involved in atmospheric circulation and which originates as precipitation at the Earth’s surface (meteoric water); (2) seawater; (3) interstitial water that is buried along with the enclosing … How is hydrothermal solution formed? hydrothermal