nyc917
Course Students
 
Posts: 11
Joined: Fri Oct 12, 2012 8:21 pm
 

Graphics Interpretation: Earth's geological history

by nyc917 Thu Jun 27, 2013 5:19 am

Source: http://www.mba.com/the-gmat/nex-gen/samples/Sample-471

The diagram shows, in three column groupings, various divisions of Earth's geological history since its formation approximately 4,600 million years ago. In the leftmost column grouping, the Precambrian eon is subdivided into chronometric eons shown on the far left; but otherwise, in the rest of the graphic, each subsequent column to the right shows the subdivisions of the timeframes to its left. Each of the rightmost two column groupings is a magnification-with additional information-of a portion of the grouping directly to its left.

According to the diagram the beginning of the Cambrian period / Triassic period / Pliocene epoch / Precambrian eon marks the onset of a new eon, era, and period in geological history.

---

Stacey has already put together a great analysis on how to approach this problem: http://www.manhattangmat.com/blog/index.php/2012/03/28/the-next-gen-gmat-graphics-interpretation-2/

However, I have a question on the second part of this question.

The question asked, according to the diagram the beginning of the xxxx marks...

Looking at the correct answer, Cambrian, the beginning of this period is not exactly the onset of a new eon, era, and period in geological history. It should be the "end", right? Or am I not reading this correctly?
tim
Course Students
 
Posts: 5665
Joined: Tue Sep 11, 2007 9:08 am
Location: Southwest Airlines, seat 21C
 

Re: Graphics Interpretation: Earth's geological history

by tim Sat Jul 06, 2013 2:12 pm

Tricky one, but you have to read the diagram from the bottom up! :) The beginning of the Cambrian is at the bottom, because the bottom of the diagram is the oldest time period.
Tim Sanders
Manhattan GMAT Instructor

Follow this link for some important tips to get the most out of your forum experience:
https://www.manhattanprep.com/gmat/forums/a-few-tips-t31405.html
nyc917
Course Students
 
Posts: 11
Joined: Fri Oct 12, 2012 8:21 pm
 

Re: Graphics Interpretation: Earth's geological history

by nyc917 Mon Jul 08, 2013 4:31 am

tim Wrote:Tricky one, but you have to read the diagram from the bottom up! :) The beginning of the Cambrian is at the bottom, because the bottom of the diagram is the oldest time period.


Got it, thanks Tim.
tim
Course Students
 
Posts: 5665
Joined: Tue Sep 11, 2007 9:08 am
Location: Southwest Airlines, seat 21C
 

Re: Graphics Interpretation: Earth's geological history

by tim Wed Jul 10, 2013 2:58 pm

Any time!
Tim Sanders
Manhattan GMAT Instructor

Follow this link for some important tips to get the most out of your forum experience:
https://www.manhattanprep.com/gmat/forums/a-few-tips-t31405.html