Like the state's Devonian rocks, those of Early Carboniferous age are buried below the surface and inaccessible apart from core drilling.
12.
Some of the work includes core drilling to learn about climatic change and attempts to determine the age of the crater.
13.
To extract located victims the rescue squad uses larger-scale equipment such as concrete chain saws, rotary cutting tools and core drilling machines.
14.
By September 1, 2009, the coring had reached 1757.84 m for this season, setting a single-season deep ice core drilling record in 100 days.
15.
The project, involving scientists from New Zealand, the United States, Britain, Italy and Germany, will include the deepest core drilling yet attempted in Antarctica.
16.
Core drilling shows evidence that the whole bay was once covered by several inches of sawdust from the dozens of sawmills around the bay's shores.
17.
This applies to all drilling methods, except that in diamond core drilling the use of thinner rods and casing may permit the hole to continue.
18.
It is located at lat 28?22 N ., long 86?62 E . The ice-core drilling site is situated at 5, 700 m above mean sea level.
19.
The new record beat by 13 feet ( four meters ) the previous deepest ice core drilling, set by Americans in Greenland a few years ago.
20.
Core drilling, on the other hand, can be carried out to a large depth provides full information, but only for a very small fraction of the pile volume.
