Reading Comprehension

Source: OG 12th Ed

According to a recent theory, Archean-age
gold-quartz vein systems were formed more than
two billion years ago from magmatic fluids that
originated from molten granite-like bodies deep
beneath the surface of the Earth. This theory is
contrary to the widely held view that the systems
were deposited from metamorphic fluids, that is,
from fluids that formed during the dehydration of
wet sedimentary rocks.

The recently developed theory has considerable
practical importance. Most of the gold deposits
discovered during the original gold rushes were
exposed at the Earth's surface and were found
because they had shed trails of alluvial gold
that were easily traced by simple prospecting
methods. Although these same methods still lead
to an occasional discovery, most deposits not yet
discovered have gone undetected because they are
buried and have no surface expression.

The challenge in exploration is therefore to
unravel the subsurface geology of an area and
pinpoint the position of buried minerals. Methods
widely used today include analysis of aerial images
that yield a broad geological overview; geophysical
techniques that provide data on the magnetic,
electrical, and mineralogical properties of the
rocks being investigated; and sensitive chemical
tests that are able to detect the subtle chemical
halos that often envelop mineralization. However,
none of these high-technology methods are of any
value if the sites to which they are applied have
never mineralized, and to maximize the chances of
discovery the explorer must therefore pay particular
attention to selecting the ground formations most
likely to be mineralized. Such ground selection relies
to varying degrees on conceptual models, which
take into account theoretical studies of relevant
factors.

These models are constructed primarily from
empirical observations of known mineral deposits
and from theories of ore-forming processes.
The explorer uses the models to identify those
geological features that are critical to the formation
of the mineralization being modeled, and then tries
to select areas for exploration that exhibit as many
of the critical features as possible.

Q
The theory mentioned in lines 1-5 relates to the conceptual models discussed in the passage in which of the following ways?
(A) It may furnish a valid account of ore-forming processes, and, hence, can support conceptual models that have great practical significance.
(B) It suggests that certain geological formations, long believed to be mineralized, are in fact mineralized, thus confirming current conceptual models.
(C) It suggests that there may not be enough similarity across Archean-age gold-quartz vein systems to warrant the formulation of conceptual models.
(D) It corrects existing theories about the chemical halos of gold deposits, and thus provides a basis for correcting current conceptual models.
(E) It suggests that simple prospecting methods still have a higher success rate in the discovery of gold deposits than do more modern methods.

OA: A

Can someone please help me to understand this question?

Anybody would like to try this.

This is a very hard question because although it specifically refers to the first few lines and has a key word in a later paragraph, the answer is actually found in the last paragraph. In that paragraph the author says "These models (conceptual models) are constructed.... from theories of ore-forming processes." and the in first paragraph they discuss atheory about ore forming process. Thus the relationship is that the model is constructed from the theory. That is why A works the best.


These type of reading comp need you to understand the paragraphs and how they fit together. The best way to deal with most reading comp passages is to read each paragraph quickly - skimming over examples and re-statements to find out what the author is saying in that paragraph - I tell my students to summarize each paragraph in 3-5 words (not a sentence). If you do that for each you can normally figure out how they all fit together and get a better idea of how reading comp works.

Hello Beky,

That sounds like a good trick to attempt the RCs. Thanks. Please give some additional tips for RC. RCs are pulling down my scores in verbal

Thanks

Shweta

akhp77 wrote:Anybody would like to try this.

The theory mentioned in lines 1-5 relates to the conceptual models discussed in the passage in which of the following ways?

(A) It may furnish a valid account of ore-forming processes, and, hence, can support conceptual models that have great practical significance.

(B) It suggests that certain geological formations, long believed to be mineralized, are in fact mineralized, thus confirming current conceptual models.

(C) It suggests that there may not be enough similarity across Archean-age gold-quartz vein systems to warrant the formulation of conceptual models.

(D) It corrects existing theories about the chemical halos of gold deposits, and thus provides a basis for correcting current conceptual models.

(E) It suggests that simple prospecting methods still have a higher success rate in the discovery of gold deposits than do more modern methods.


The stem clearly asks us to "connect" the recent theory with conceptual models. SO look for the keyword that matches with both of them.

@becky did a great job here!! Thanks...

@ shweta..

Probably u can check TestLuv(deepak Dada's) RC posts.. I bet u will love reading them.....

@ prasad bhai....
Post some more..I am still hungry for acing the GMAT even after 1600 odd posts....[/i]

Thanks Becky

gmatmachoman wrote:
Probably u can check TestLuv(deepak Dada's) RC posts.. I bet u will love reading them.....

Where is the links?

akhp77 wrote:Source: OG 12th Ed

According to a recent theory, Archean-age
gold-quartz vein systems were formed more than
two billion years ago from magmatic fluids that
originated from molten granite-like bodies deep
beneath the surface of the Earth. This theory is
contrary to the widely held view that the systems
were deposited from metamorphic fluids, that is,
from fluids that formed during the dehydration of
wet sedimentary rocks.

The recently developed theory has considerable
practical importance. Most of the gold deposits
discovered during the original gold rushes were
exposed at the Earth's surface and were found
because they had shed trails of alluvial gold
that were easily traced by simple prospecting
methods. Although these same methods still lead
to an occasional discovery, most deposits not yet
discovered have gone undetected because they are
buried and have no surface expression.

The challenge in exploration is therefore to
unravel the subsurface geology of an area and
pinpoint the position of buried minerals. Methods
widely used today include analysis of aerial images
that yield a broad geological overview; geophysical
techniques that provide data on the magnetic,
electrical, and mineralogical properties of the
rocks being investigated; and sensitive chemical
tests that are able to detect the subtle chemical
halos that often envelop mineralization. However,
none of these high-technology methods are of any
value if the sites to which they are applied have
never mineralized, and to maximize the chances of
discovery the explorer must therefore pay particular
attention to selecting the ground formations most
likely to be mineralized. Such ground selection relies
to varying degrees on conceptual models, which
take into account theoretical studies of relevant
factors.

These models are constructed primarily from
empirical observations of known mineral deposits
and from theories of ore-forming processes.
The explorer uses the models to identify those
geological features that are critical to the formation
of the mineralization being modeled, and then tries
to select areas for exploration that exhibit as many
of the critical features as possible.

Q
The theory mentioned in lines 1-5 relates to the conceptual models discussed in the passage in which of the following ways?
(A) It may furnish a valid account of ore-forming processes, and, hence, can support conceptual models that have great practical significance.
(B) It suggests that certain geological formations, long believed to be mineralized, are in fact mineralized, thus confirming current conceptual models.
(C) It suggests that there may not be enough similarity across Archean-age gold-quartz vein systems to warrant the formulation of conceptual models.
(D) It corrects existing theories about the chemical halos of gold deposits, and thus provides a basis for correcting current conceptual models.
(E) It suggests that simple prospecting methods still have a higher success rate in the discovery of gold deposits than do more modern methods.

OA: A

Can someone please help me to understand this question?

I agree with Becky,This can easily be considered as one of the very difficult kind of RC question, major reason,question requires understanding of whole passage structure. In this case we link conceptual Models mentioned in 3rd paragraph to utilization of Models in 4th paragraph and validation of Model's by "New Theory" stated in first Para. Interestingly, if you read II Para "The recently developed theory has considerable practical importance." IMO is main point of whole passage that author tries to support throughout the passage and this question asks us to address that very point- How "New theory" can Validate "Conceptual frameworks".thatswhy A.

that surely was a blinder!! phew!!