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lesantik [10]
3 years ago
7

Relative ages expressed on the geologic time scale primarily resulted from the study of ________.

Geography
1 answer:
Mice21 [21]3 years ago
8 0

Answer:

B. fossil content and spatial relationships among sedimentary rocks

Explanation:

Earth's geological scale. Geological division of the Earth from its origins 4.5 billion years ago, to the present. divided into four Hadeic, Archeozoic, Proterozoic and Phanerozoic eons, their names refer to the evolution of terrestrial life. These divisions do not have an exact temporal value, the extent of each division and subdivisions are marked by the geological evolution of the planet not by exact periods of time.

This division can be done thanks to the study of the different<u> fossils found and the analysis of the different sedimentary rocks found </u>and their relationship with the environment in which they are found.

The Phanerozoic eon, which we know best thanks to the existence of visible fossils, is divided into three ages: it was Paleozoic, it was Mesozoic and it was Cenozoic. The ages, in turn, are divided into periods, these in times and the latter in ages. Geological time is framed in a macro-temporal scale of variable stages that depend largely on large geological events that occurred during the history of the planet. It is called Precambrian all the time prior to the Phanerozoic eon, that is, it would include the three previous eons.

Recently the name Ediacariense has been added to designate a period (635Ma-540Ma), located at the end of the Precambrian, and whose name derives from the appearance of new animals and up to half a meter in size (Ediacara fauna). The precambrian is a supereón, which is the division on the geological scale above the eons, this being so large they lack importance for the study of the geological history of the planet.

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RSB [31]
Lava flows are the least hazardous of all processes in volcanic eruptions. How far a lava flow travels depends on the flows temperature, silica content, extrusion rate, and slope of the land. A cold lava flow will not travel far and neither will one that has a high silica content. Such a flow would have a high viscosity<span> (a high resistance to flow). A basalt flow like those in Hawai'i have low silica contents and low viscosities so they can flow long distances. Such a flow can move as far away as 4 km from its source and have a thickness of 10 m (Bryant, 1991). These flows can move at rates of several kilometers per hour (Scott, 1989). </span><span>More silica-rich flows can move as far away as 1.3 km from their sources and have thicknesses of 100 m (Bryant, 1991). These flows can move at rates of a few to hundreds of meters per hour (Scott, 1989). If a lava flow is channelized or travels underground in a lava tube then the distance it travels is greatly extended.</span>
6 0
3 years ago
Read 2 more answers
Question 6 (1 point)
mestny [16]

Answer:

C, Northern and Western Hemispheres

Explanation:

We know that this is true because option A is completely incorrect since the Southern Hemispere contains south America, part of Africa, Australia, Antartica, and part of Asia. While the Eastern Hemisphere contains Africa, The Middle East, Asia, Europe, and Australia.

Based on the facts above, we can rule out A, B, and D, thus leading us to C!

Hope this helps! :)

8 0
3 years ago
Read 2 more answers
A high plateau encircled by mountains is called ______.
Paladinen [302]

Answer:

A high plateau encircled by mountains are called altiplanos

Explanation:

4 0
3 years ago
What is the natural ecosystem / biome in the Arctic?
spayn [35]

Answer:

Tundra ecosystems are treeless regions found in the Arctic and on the tops of mountains, where the climate is cold and windy

Explanation:

7 0
3 years ago
Large megathrust earthquakes in the mountainous regions flanking the Mediterranean sea are generally due to ________.
Serga [27]

Explanation:

the collision of the African Plate with Eurasia

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