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Concretions
Beginning of essay
Dating back to the 18th century have been known as geologic curiosity’s due to the various sizes, shapes and compositions. have also been thought to be dinosaur eggs, extra-terrestrial debris, human artifacts and animal and plant fossils. Due to these curiosity’s I will try and enlighten you mo ....
Middle of essay
....de or iron hydroxide such as goethite. But also can be composed of other minerals ranging from siderite, ankerite, dolomite, pyrite, baryite and gypsum.
Concretions form in many different ways. The box shape of some ironstone concretions most often depend on the way a sandstone or shale bed breaks up due to the action of weathering into regular blocks of various sizes. The way in which this separation takes place along natural planes of weakness in a rock such as a horizontal bedding sur.... |
| Number of words: 1378 |
Approximate pages: 6 |
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