Bituminous limestone is
limestone impregnated and sometimes deeply colored with
bituminous matter derived from the decomposition of animal and plant remains entombed within the mass or in its vicinity.
Uses
The amount of bituminous matter or asphalt in the pores of the rock is sometimes sufficient to permit the material being used for asphalt pavements after simply powdering and heating it. Still better results are obtained by mixing it with
bituminous sandstone.
Sources
In the
United States, bituminous limestone has been found in
Oklahoma
Oklahoma (; Choctaw language, Choctaw: ; chr, ᎣᎧᎳᎰᎹ, ''Okalahoma'' ) is a U.S. state, state in the South Central United States, South Central region of the United States, bordered by Texas on the south and west, Kansas on the nor ...
,
Texas, and
Utah. Much bituminous limestone was also mined in
Germany,
Switzerland
). Swiss law does not designate a ''capital'' as such, but the federal parliament and government are installed in Bern, while other federal institutions, such as the federal courts, are in other cities (Bellinzona, Lausanne, Luzern, Neuchâtel ...
, and
France, from where large quantities of it were exported to the United States.
Notes
References
*{{NIE, wstitle=Bituminous Limestone, year=1905
Limestone
Bitumen-impregnated rocks