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Cryptocrystalline quartz concretions (flint) of different density, size, morphology and abundance, occur isolated and concentrated in layers in the Late Cretaceous (Tuffaceous) Chalk of NW Europe. Concretions started to grow during early diagenesis at sites of elevated authigenic silica-polymorph concentrations, a result of bacterial metabolism in an anoxic mixture of skeletal carbonate, skeletal opal, organic matter and pore fluid. The late diagenetic growth of flint nodules has been investigated with the help of a numerical model that simulates the dissolution, diffusion and precipitation of different silica polymorphs in a medium of changing porosity/permeability. It is suggested that the occurrence of various flint types reflects the distribution of the early diagenetic, authigenic silica polymorphs, rather than the distribution of detrital skeletal opal. The model results imply that flint nodules can be used to reconstruct the depositional and early diagenetic conditions during the genesis of sequences of Chalk with flint.
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Where to find flint?
Flint is a type of chert. You can find chert all over Washington. Where do you live? If you live near Bellingham there are large nodules of green chert by the water on Chuckanut drive, especially around Blanchard mountain. Do you want to make stone tools or are you interested in fire making? bluepoetspub@yahoo.com
What are the 3 types of rock in the south downs?
The downs themselves are made of Chalk. However the rock type associated with the "Wealden Dome" are:ChalkGault ClayLower GreensandAshdown sandsTonbridge Wells sandOf cause the Chalk is not a homogeneous rock type and contains flint layers.
Where can you find a flint in Atlanta Georgia?
It would probably be best to look in rivers and streams.
What is the rock that makes up white cliffs of dover?
chalk
How much calcium is in chalk?
Chalk is almost pure Calcium Carbonate. Chalk is a form of Calcium.
Which two rocks are quite crumbly and not very strong?
obiousely coal
What was the late Paleolithic hand ax made from and where did they find the materials?
You will probably need to be more specific about the exact location and time period you mean. However, the "lith" part of "paleolithic" means "rock", so it was probably made from a type of rock that can be worked to form a sharp edge, such as flint. In which case they would most likely have found flint nodules on the shore near chalk cliffs; flint occurs in chalk, and wave action can wear away the much softer chalk leaving the flint nodules strewn about the base of the cliff.
How is flint formed?
Flint is unique to chalk, and chalk is entirely composed of the remains of tiny sea creatures called coccolithophores and diatoms. Their various shells and skeletons were composed of mainly calcium carbonate, with some species utilising silica. After the chalk was deposited, decompositional bacteria began to feed on organic matter and released sulphur-rich compounds. These compounds mixed with water and formed a weak acid which began to locally dissolve the calcium carbonate proto-chalk. The resulting void filled with a silica rich solution, which over time hardened along with the strata, forming the flint nodules within chalk bedding we see today.
Is flint soft?
Flint is a very hard rock and forms very sharp glassy flakes when hit with another flint. Flint was used to make knife blades by early man and is the ancient remains of sea sponges and are found in layers in chalk. Flint was also used to generate a spark in tinder boxes(a predecessor to matches) and to ignite gunpowder in early firearms.
Where to find flint?
Flint is a type of chert. You can find chert all over Washington. Where do you live? If you live near Bellingham there are large nodules of green chert by the water on Chuckanut drive, especially around Blanchard mountain. Do you want to make stone tools or are you interested in fire making? bluepoetspub@yahoo.com
What is dover sea front made of?
The white cliffs of Dover are mostly chalk (white calcium carbonate) with some small layers of black flint.
What are the 3 types of rock in the south downs?
The downs themselves are made of Chalk. However the rock type associated with the "Wealden Dome" are:ChalkGault ClayLower GreensandAshdown sandsTonbridge Wells sandOf cause the Chalk is not a homogeneous rock type and contains flint layers.
What is the origin of the chalk?
Cryptocrystalline quartz concretions (flint) of different density, size, morphology and abundance, occur isolated and concentrated in layers in the Late Cretaceous (Tuffaceous) Chalk of NW Europe. Concretions started to grow during early diagenesis at sites of elevated authigenic silica-polymorph concentrations, a result of bacterial metabolism in an anoxic mixture of skeletal carbonate, skeletal opal, organic matter and pore fluid. The late diagenetic growth of flint nodules has been investigated with the help of a numerical model that simulates the dissolution, diffusion and precipitation of different silica polymorphs in a medium of changing porosity/permeability. It is suggested that the occurrence of various flint types reflects the distribution of the early diagenetic, authigenic silica polymorphs, rather than the distribution of detrital skeletal opal. The model results imply that flint nodules can be used to reconstruct the depositional and early diagenetic conditions during the genesis of sequences of Chalk with flint.
What did people do in the hellfire caves in the past?
They made people dig the caves with their bare hands to get chalk and flint, which was used to make roads and to build houses. There was also a hellfire club in the caves.
Where can you find a flint in Atlanta Georgia?
It would probably be best to look in rivers and streams.
What is the rock that makes up white cliffs of dover?
chalk
Where are the White Cliffs of Dover located and why are they white?
The White Cliffs of Dover are located in Southeast England, along the coastline facing France and the Strait of Dover. They're white because of the chalk in the sediments that formed them.
