Below the dolostone the Rochester Shale is impenetrable to the seeping water causing it to flow horizontal and emerge and run down the rock face of the gorge.
42.
When these fluids come into contact with reactive rocks, usually carbonates such as limestone or dolostone, the fluids react with them, producing alteration ( metasomatism ).
43.
Mud rocks comprise 65 % ( mudstone, shale and siltstone ); sandstones 20 to 25 % and carbonate rocks 10 to 15 % ( limestone and dolostone ).
44.
Most other solution caves that are not composed of limestone or dolostone are composed of gypsum ( calcium sulfate ), the solubility of which is positively correlated with temperature.
45.
The Maquoketa has almost no economic use since it is dominantly a weak shale interbedded with thin dolostone, it is not good for track ballast or concrete decorative stone.
46.
Some rock layers now consist of soft shales and sandstones while others are made up of dolostone ( a rock similar to limestone which contains magnesium and is more durable ).
47.
The usage of the term " dolostone " is controversial because the name dolomite was first applied to the rock during the late 18th century and thus has technical precedence.
48.
It occurs in serpentine altered dolostone in association with skarn enriched in tungsten, strontium, beryllium and boron in the Keralia occurrence and in vugs with natrolite and thomsonite in Norway.
49.
The Zama Member at the center consists of fragmental carbonate, and is overlain by the Upper Anhydrite which consists of interbedded microcrystalline anhydrite and fine-to medium-crystalline dolostone.
50.
Early Oligocene Suwannee Limestone was recognized in the northwestern peninsula by P . F . Huddleston in 1993 as a triple subdivision of Suwannee Limestone, Ellaville Limestone, and Suwannacoochee Dolostone.
