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BONE BED

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Originally appearing in Volume V04, Page 203 of the 1911 Encyclopedia Britannica.
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See also:

BONE See also:BED , a See also:term loosely used by geologists when speaking generally of any stratum or See also:deposit which contains bones of whatever See also:kind. It is also applied to those brecciated and stalagmitic deposits on the See also:floor of caves, which frequently contain osseous remains. In a more restricted sense it is used to connote certain thin layers of bony fragments, which occur upon well-defined See also:geological horizons. One of the best-known of these is the See also:Ludlow Bone Bed, which is found at the See also:base of the Downton See also:Sandstone in the Upper Ludlow See also:series. At Ludlow itself, two such beds are actually known, separated by about 14 ft. of strata. Although quite thin, the Ludlow Bone Bed can be followed from that See also:town into See also:Gloucestershire for a distance of 45 M. It is almost made up of fragments of spines, See also:teeth and scales of ganoid See also:fish. Another well-known bed, formerly known as the " See also:Bristol " or " See also:Lias " Bone Bed, exists in the See also:form of several thin layers of micaceous sandstone, with the remains of fish and saurians, which occur in the See also:Rhaetic See also:Black See also:Paper Shales that See also:lie above the See also:Keuper marls in the See also:south-See also:west of See also:England. It is noteworthy that a similar bone bed has been traced on the same geological See also:horizon in See also:Brunswick, See also:Hanover and See also:Franconia. A bone bed has also been observed at the base of the Carboniferous See also:limestone series in certain parts of the south-west of England. BONE-See also:LACE, a kind of lace made upon a See also:cushion from See also:linen See also:thread; the See also:pattern is marked out with pins, See also:round which are See also:twisted the different threads, each See also:wound on its own bobbin. The lace was so called from the fact that bobbins were formerly made of bone.

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