1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Aleksandr-060686 [28]
3 years ago
14

Why is it so difficult for scientists to determine how the Jalisco block is moving

Geography
2 answers:
leva [86]3 years ago
7 0
Because it just is...
NeX [460]3 years ago
4 0

Answer:

Extensional faulting observed in southwestern Mexico has been related to the incipient rifting of the Jalisco block from the Mexican mainland since the Pliocene. On the basis of new structural and geophysical data, we propose that (1) the continental boundaries of the Jalisco block are ancient structures reactivated since the Pliocene at a low (<1 mm/yr) rate of deformation, and (2) Pliocene-Quaternary extensional faulting at the edges of Jalisco block is a basement-controlled intraplate deformation related to plate boundary forces rather than to active continental rifting. The Jalisco block boundaries first developed in response to the uplift of the Puerto Vallarta batholith in pre-Neogene time and underwent a complex contractile deformation before the Pliocene. During Pliocene-Quaternary times north-northeast extension reactivated the northern boundary, forming the Tepic-Zacoalco rift, whereas east-southeast extension formed the northern Colima rift. South of the Colima volcano, active extension is found only west of the so-called southern Colima rift and partly reactivates old northeast-trending basement faults. The parallelism between the subducted Rivera-Cocos plate boundary zone and the eastern neotectonic boundary of the Jalisco block supports eastsoutheastward motion of the southern Mexican blocks induced by the differential motion and oblique subduction of the Cocos and Rivera plates. On the other hand, we envisage Pliocene-Quaternary extension along the northern boundary as an upper-plate response to the low convergence rate and the steep subduction angle of the Rivera plate.

You might be interested in
What qualities did greek architects strive for in their work
kow [346]
For big beautiful buildings and proportions...
5 0
3 years ago
What REGIONS does Australia seem to have
kirill [66]
7 regions
-Western Australia
-Northern Territory
-Queensland
-South Australia
-New south wales & ACT
-Victoria
-Tasmania
6 0
3 years ago
2. A 260 em cylinder container was used to collect an undisturbed soil sample. The container and soil weighed 403 g when dried.
sineoko [7]

Answer:

The Bulk density = 1.3 g/cm³

the porosity of the sample is 132 cm³

Explanation:

Given:

Volume of cylinder = 260 cm³

Mass of container and the soil = 403 g

Mass of the empty container = 65 g

Thus,

The mass of the soil is = 403 - 65 = 338 g  

Now,

The Bulk density = \frac{\textup{Mass}}{\textup{Volume}}

or

The Bulk density = \frac{\textup{338 g}}{\textup{260}}

or

The Bulk density = 1.3 g/cm³

also,

average particle density for mineral soil is usually given as 2.65 g/cm³

i.e the air present in the given soil sample has reduced its density from 2.65 g/cm³ to 1.3 g/cm³

The mass of the whole sample = Volume × Density

= 260 × 2.65

= 689 gm

but,

The actual mass of the dry sample = 338 g

thus,

Mass of air in the sample = 689 - 338 = 351 g

Therefore,

the volume of 351 g soil = \frac{\textup{mass defect of soil}}{\textup{density of soil}}

=  \frac{\textup{351}}{\textup{2.65}}

= 132.45 cm³

so the porosity of the sample is 132 cm³

4 0
3 years ago
What led to the end of trans-saharan trade routes
zysi [14]
<h2>The End of Trans-Saharan Trade Routes:</h2>

Explanation:

The factors that led to the end of trans-Saharan trade routes are:

  • Civil unrest due to collapse of the Songhay Empire, the Timbuktu, by the Morracans in 1591
  • The extreme desert conditions like extreme climates, excessive heat, lack of water and food etc made the travel logistics very tough. This made people opt for other transport systems
  • Huge advancements made in maritime travel  
  • Exploration of West African trade routes
  • Economic, political and social changes which led to the end of trans-Saharan trade routes
6 0
3 years ago
If you see the north star what is your longitude
OLga [1]
When viewed from the equator (0 degrees latitude), Polaris lies on the northern horizon. As an observer moves northward--say, to Houston, Tex. (30 degrees latitude)-- Polaris is located 30 degrees above the northern horizon.
8 0
3 years ago
Other questions:
  • Which of the following is the primary cause of change in regional metamorphism? pressure
    12·1 answer
  • What kind of bridge is the golden gate bridge
    14·1 answer
  • What is the most likely cause of a large Portuguese-speaking population in Brazil?
    13·2 answers
  • If the asthenosphere was made of rigid rock, like the lithosphere, do you think tectonic plates would move the same way? Justify
    5·1 answer
  • The satellite photo above shows a narrow strip of land that connects two larger landmasses. Which type of landform is shown in t
    6·2 answers
  • Severe weather can best be defined as weather that
    14·1 answer
  • Yall please help me i hot ti turn this in asap
    14·2 answers
  • Why was the Revolutionary War a problem for Native American tribes?
    12·1 answer
  • Here is all the materials you need to build the storage shed is this sentence correct?​
    5·2 answers
  • Rosa made 1 phone call on Thursday, 3 phone calls on Friday, 9 phone calls on Saturday, and 27 phone calls on Sunday. If this pa
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!