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packstone

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packstone [′pak‚stōn]
(petrology)
A sedimentary carbonate rock whose granular material is arranged in a self-supporting framework, yet also contains some matrix of calcareous mud.


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These rocks are of significant commercial importance and comprise a series of porous, clean, pellet and fossiliferous limestones with inter-bedded tight (often stylolitic lime) mudstones and packstones.
The upper Llandovery to lower Wenlock succession considered in the present paper is composed of nodular limestones, mainly wacke- to packstones, of the Rumba Formation and dolomitic marlstones of the Velise and Jaani formations (see Fig.
There are scattered bioclastic packstone and grainstone horizons which commonly show fining upward (Wong, 2002); these represent deposition during brief storm events.
 
 
 
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