| Phosphatic nodules, large dolostone septaria, iron sulfide nodules, and crystal-lined vugs are present. |
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| They sometimes are found together with dolostone concretions, barite nodules, or phosphatic nodules. |
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| Matrix minerals of the dolostone septaria are ferroan dolomite, quartz, calcite, and pyrite. |
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| The canyon system cuts down through marine sandstone, siltstone and dolostone. |
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| For petroleum engineering, this development is the most important aspect, especially when comparing limestone with dolostone sequences. |
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| The section consists of calcareous shale with intercalated sparse limestone beds, dolomitic shales, and some dolostone beds. |
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| A walk over the property turned up layers of promising dolostone that was loaded with pockets in several areas and a generous scattering of hand-dug pits of various ages. |
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| Ordovician strata are characterized by numerous and diverse trilobites and conodonts found in sequences of shale, limestone, dolostone, and sandstone. |
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| Nodules and crystal groups of iron sulfide of Middle Devonian to Pennsylvanian age are frequently present in beds of black shale and coal or, less commonly, dolostone. |
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| Technically, Queenston limestone is dolostone, slightly harder than its Indiana relative because of its magnesium content. |
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| A lens-like conglomerate interbed, with flat pebbles of the underlying dolostone, occurs on the 3a and 3b boundary. |
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| This outcrop was mapped as Upper Devonian Ohio Shale by Reidel and lies stratigraphically above a Middle Silurian dolostone. |
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| Pure dolostone, dolomitic marlstone, siliciclastic sediments, and mixed carbonate-siliciclastic rocks are represented in southern and southeastern Estonia. |
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| The Attawapiskat region is comprised of karst landforms, generally the result of mildly acidic rainfall acting on soluble limestone or dolostone bedrock. |
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| Dolostone septaria and iron sulfide nodules occur in the Late Devonian Huron Shale. |
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| The rare earths mineralisation has been encountered within the Geolsec formation and within surrounding rocks of Coomalie Dolostone and Whites Formation. |
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