-
Chert (/tʃɜːrt/) is a hard, fine-grained
sedimentary rock
composed of
microcrystalline or
cryptocrystalline quartz, the
mineral form of
silicon dioxide...
- 57°20′12″N 002°50′29″W / 57.33667°N 2.84139°W / 57.33667; -2.84139 The
Rhynie chert is a
Lower Devonian sedimentary deposit exhibiting extraordinary fossil...
- Mill Cr****
chert is a type of
chert found in
Southern Illinois and
heavily exploited by
members of the
Mississippian culture (800 to 1600 CE). Artifacts...
-
white chert.
Facies 3,
which overlies facies 2,
consists largely of centimeter-layered
chert. The
layered chert consists of white-gray
layered chert and...
-
microorganisms permineralized in 3.465-billion-year-old
Australian Apex
chert rocks. However, the
evidence for the
biogenicity of
these microstructures...
- del Consell, pel qual s’aprova el
canvi de denominació del
municipi de
Chert/Xert per la
forma exclusiva en valencià de Xert. [2014/6338] DOCV. Generalitat...
- The
Gunflint chert (1.88 Ga) is a
sequence of
banded iron
formation rocks that are
exposed in the
Gunflint Range of
northern Minnesota and northwestern...
- is made up of
three formations, the Gr****y ****
Chert, the
Backbone Limestone and
Clear Cr****
Chert. It is
Lower Devonian in age.
Eastward the group...
-
sediment or
sedimentary rock.
Examples include pyrite nodules in coal, a
chert nodule in limestone, or a
phosphorite nodule in
marine shale. Normally,...
- and
William H. Lang in 1917. The
species is
known only from the
Rhynie chert in Aberdeenshire, Scotland,
where it grew in the
vicinity of a silica-rich...
