 | James Brian Eby - Coal - 1922 - 116 pages
...alternating layers of different quality coal, such as hard and soft or bright and dull coal. Partings range in thickness from a fraction of an inch to several feet. Where partings exceed two feet it is seldom that more than one bench of the bed is recovered and the... | |
 | Earth sciences - 1926 - 566 pages
...wide. Fully half of the volume of rock is of thin injection sills of quartz- feldspar pegmatite that range in thickness from a fraction of an inch to several feet. The abundant injection of this zone is governed by two factors: I The sedimentary rock of this area... | |
 | Geological Survey of Canada - Geology - 1928 - 346 pages
...thinly bedded types of finer and more even-grained fabric. The beds of the fine-textured sediments vary in thickness from a fraction of an inch to several feet, and lamination lines are well developed in many outcrops. Many of the thin beds of these sediments are... | |
 | William Ronald Chapman, Reginald Arthur Mott - Coal - 1928 - 830 pages
...carbonaceous shales, many of which resemble cannel coal in their appearance. Dirt partings may vary in thickness from a fraction of an inch to several feet, and the extent to which the dirt from partings can be excluded from the coal won depends on the thickness... | |
 | Geological Survey of Canada - Geology - 1928 - 364 pages
...thinly bedded types of finer and more even-grained fabric. The beds of the fine-textured sediments vary in thickness from a fraction of an inch to several feet, and lamination lines are well developed in many outcrops. Many of the thin beds of these sediments are... | |
 | Geology - 1960 - 412 pages
...bottomset beds have a distinct stratification, even where the textural variations are not large. Individual layers range in thickness from a fraction of an inch to several feet, and are thinner and more distinct above Virgin Canyon than they are in the western part of the lake. In... | |
 | Geology - 1972 - 154 pages
...350-footthick sequence of light-pink, tan, or off-white tuffaceous siltstone and mudstone beds. Beds range in thickness from a fraction of an inch to several feet, and relatively thin beds can be traced laterally for several thousand feet. Thick beds or groups of beds... | |
 | Wallace R. Hansen - Geology - 1956 - 274 pages
...appear to extend very far but seem instead to thin out, mostly in a few tens of yards or less. They range in thickness from a fraction of an inch to several feet, and commonly they are interbedded with biotite gneiss. Contracts are mostly gradational, although in places... | |
 | Geological Survey (U.S.), William Ogden Smith - Mead, Lake (Ariz. and Nev.) - 1954 - 640 pages
...textural variations are not large, the bottomset beds do have a distinct stratification. Individual layers range in thickness from a fraction of an inch to several feet, and are thinner and more distinct above Virgin Canyon than they are in the western part of the lake. In... | |
 | Geological Survey (U.S.) - 1960 - 282 pages
...bottomset beds have a distinct stratification, even where the textural variations are not large. Individual layers range in thickness from a fraction of an inch to several feet, and are thinner and more distinct above Virgin Canyon than they are in the western part of the lake. In... | |
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The sandstone layers range in thickness from a fraction of an inch to several feet and in grain from fine to pebbly. 
