Engelder, who has studied natural rock fractures in this area for more than 25 years, noted that drilling horizontally through the Marcellus shale perpendicular to the vertical fractures better connected the natural pathways for gas flow.
22.
If the ice layer results from freezing from both sides ( e . g ., above and below ) the rock fracture tends to lie deeper ( e . g ., 2-3.5 cm in chalk ).
23.
In addition to accelerating uplift, other indicators of an eruption would include earthquakes _ typically swarms of small quakes generated by rock fracturing as magma moves upward _ and large emissions of volcanic gases, such as carbon dioxide.
24.
If the ice layer resulted from cooling from a single direction ( e . g ., the top ) the rock fracture tends to lie close to the surface ( e . g ., 1 2 cm in chalk ).
25.
If the ice layer resulted from a cooling from a single direction ( e . g ., the top ) the rock fracture tends to lie close to the surface ( e . g ., 1 2 cm in chalk ).
26.
To carry wastes from the site, the water would have to percolate down another 1, 000 feet to reach the water table, but a report last month to Congress and the Energy Department by a panel of outside scientists, the Nuclear Waste Technical Review Board, found that water may flow relatively quickly, through rock fractures.
27.
Haynes ( 1973 ) postulated that rock fracturing by tectonic stresses, weather, rock-on-rock percussion in streams and mudflows, pressure retouch of buried cobbles, and successive generations of flake removal and separation from cores through cycles of erosion and redeposition could have occurred during deposition of the alluvial deposits at Calico and produced specimens indistinguishable from artifacts.
