Not every tribe had access to chert or rocks.Kaynak: pontiacdailyleader.com

He didn't get bored when I started to talk about the significance of the chert and pillow basalts at Twin Peaks.Kaynak: science.kqed.org

The overall thickness, magnetism, texture, color of the chert bands and structural features such as bedding thickness, banded and or massive nature of the units, fault zones are all determined and described.Kaynak: juniorminingnetwork.com

Mill Creek chert is a type of chert found in Southern Illinois and heavily exploited by members of the Mississippian culture (800 to
Kaynak: Mill Creek chert

The Rhynie chert is an Early Devonian sedimentary deposit exhibiting extraordinary fossil detail or completeness (a Lagerstätte ).
Kaynak: Rhynie chert

The Gunflint chert (1.88 Ga ) is a sequence of banded iron formation rocks that are exposed in the Gunflint Range of northern Minnesota
Kaynak: Gunflint chert

Flint is a hard, sedimentary cryptocrystalline form of the mineral quartz categorized as a variety of chert . It occurs chiefly as
Kaynak: Flint

Rocks are turbidite s, block in matrix mélange , chert , and volcanics. The accretionary complex itself could either be the toe of a
Kaynak: Narooma Terrane

(greenstones), deep-sea radiolarian chert s, greywacke sandstone s, limestone s, serpentinite s, shale s, and high-pressure metamorphic
Kaynak: Franciscan Assemblage

upwelling-rich assemblages and its unique highly siliceous rocks from diatom-rich planktons forming diatomite s, porcelainite s, and banded chert s
Kaynak: Monterey Formation

Knapping is the shaping of flint , chert , obsidian or other conchoidal fracturing stone through the process of lithic reduction to
Kaynak: Knapping

Novaculite is a form of chert or flint found in the Ouachita Mountains of Arkansas and Oklahoma and in the Marathon Uplift of Texas
Kaynak: Novaculite

A microlith is a small stone tool usually made of flint or chert and typically a centimetre or so in length and half a centimetre wide.
Kaynak: Microlith

minerals in permineralisation cements are carbonate s (especially calcite), forms of amorphous silica (chalcedony , flint , chert ) and pyrite .
Kaynak: Sedimentary rock

Chipped stone tools are made from cryptocrystal line materials such as chert or flint , radiolarite , chalcedony , basalt , quartzite
Kaynak: Stone tool

Rhyniella praecursor (meaning "small creature of the Rhynie chert, a forerunner of modern hexapoda") is a fossil springtail from the
Kaynak: Rhyniella praecursor