Some of our most beautiful rivers are ‘chalk streams’. Their pure, clear, constant water from underground chalk aquifers and springs, flowing across flinty gravel beds, make them perfect sources of ...

Each of these geological periods is represented by one or more rocks ... sarsen stones – big blocks of quartz-cemented sandstone that sit in the chalk landscape of the UK. “Famously they were used by ...

The United States Geological Survey are a government science agency for the United States of America. This agency specialises in the provision of reliable scientific information on the US natural ...

I looked up chalk on Wikipedia, for the simple reason that Sussex is a county of chalk downs. (Plus, I suppose, I felt shamed by my lack of geological knowledge.) ...

Humans abstract (remove) water from rivers to use in our homes, farms and industries. In areas of the UK with a chalk geology we often extract water from the ground (i.e. groundwater) for domestic ...

Data now shows that the north of Scotland has the softest water in the UK, which is due to the minimal chalk content in the geology. Northumberland, Tyne & Wear and Lancashire down through the ...

A selection of fossilized micrometeorites recovered from Cretaceous chalk. These particles were initially composed ... how the flux of extraterrestrial dust to earth changed over geological time ...

For example: The soft rock is made of clay and sands, and the hard rock is chalk and limestone ... Key fact Coastlines where the geology alternates between strata (or bands) of hard rock and ...