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Jet001 [13]
1 year ago
8

What is the structure of a shield volcano?

Geography
1 answer:
valina [46]1 year ago
5 0

The cone-shaped structure, or edifice, of the volcano is formed by the symmetrical buildup of lava and/or pyroclastic substance around the central vent system. The central vent is deep connected to a magma chamber, which serves as the primary storage area for eruptive material.

The third type of volcano, shield volcanoes, are almost entirely composed of fluid lava flows. Stream after stream spills out in all ways from a central summit exhaust, or group of vents, forming a broad, gently sloping cone with a profile similar to that of a warrior's shield.

Learn more on volcano -

brainly.com/question/14175701

#SPJ4

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Scientists find trilobites during a routine dig. Trilobites were common in the Paleozoic Era (540 to 245 million years ago) and
kifflom [539]

Answer:

A and C

Explanation:

The rock layers must have formed at different times because they contain two different biozones. The rock layer containing the trilobites must have formed before the one containing the ammonites. The key thing to note here is that the Trilobites only lived from 540 to 248 million years ago. And that the Ammonites were from 245 to 65 million years ago. So there's a 3 million year gap between these 2 different creatures where neither of them existed. So the dig where the trilobites were found has to be at least 3 million years older than the dig where the Ammonites were found. So with that in mind, let's look at the options and see what makes sense.

The rock layers must have formed at the same time because they both contain biozones. * This is nonsense no matter what dates you're speaking of. In effect it claims that all rocks that indicate life were created at the same time. So this is definitely a bad choice.

The rock layers must have formed at different times because they contain two different biozones. * This is technically incorrect since it assumes that all biozones represent an unique period of time which is incorrect. However, since the biozones represented by the presence of Trilobites and Ammonites don't overlap, it is true that these these rock layers were formed at different times. I would have preferred if this option said "non overlapping biozones". But on the balance, I'd consider this option to be true, so it should be selected.

The rock layer containing the trilobites must have formed before the one containing the ammonites. * This is definitely true since the last Trilobite died about 3 million years before the first Ammonite lived. So this is a correct choice.

The rock layer containing the trilobites must have formed after the one containing the ammonites.

* This is the opposite of the previous option. And since the previous option was true, this option must be false. So this is a bad choice

8 0
3 years ago
Which of these is an example of a subsequent boundary?
miskamm [114]

Answer:

A

Explanation:

Subsequent boundaries are boundaries that were there before a place was established.

Example: Berlin and the wall of Berlin.

Hope this helps :)

6 0
3 years ago
Which of these is the MOST accurate reason for the population density of the area shown by the red arrow?
Zielflug [23.3K]
B) A lack of water it's the desert
5 0
4 years ago
Read 2 more answers
Why some people don't have houses to stay in?
inna [77]
Cause they can't afford a house they don't have enough money for it hope this helps
4 0
3 years ago
Read 2 more answers
Names of Tools used by a Soil Conservationist
Virty [35]

Answer:

<u>Mould board plough, disc plough, soil stirring plough, ridger plough,</u> tool frames/carriers with mouldboard plough or tillage sweeps, etc. are improved implements designed for breaking soil. Ploughs are used to break soil and invert furrow slice to control weeds, etc.

3 0
2 years ago
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