Surf Wiki
Save to docs
general/limestone

From Surf Wiki (app.surf) — the open knowledge base

Packstone

Packstone
A Packstone: grain supported by small grains (width of picture is 7mm)

Under the Dunham classification (Dunham, 1962) system of limestones, a packstone is defined as a grain-supported carbonate rock that contains 1% or more mud-grade fraction. This definition has been clarified by Lokier and Al Junaibi (2016) as a carbonate-dominated lithology containing carbonate mud (2 mm.

The identification of packstone

Thin section photomicrograph of peloid packstone with fragmented bioclasts.

A study of the adoption and use of carbonate classification systems by Lokier and Al Junaibi (2016) identified three common problems encountered when describing a packstone:

  • Failure to identify the fabric as supported by the sand grade grain-size fraction - resulting in misidentification as wackestone.
  • Packstones with very small volumes of carbonate mud may be misclassified as grainstone.
  • Incorrectly estimating the volume of the component grains 2 mm.

References

References

  1. Dunham, R.J. (1962) Classification of carbonate rocks according to depositional texture. In: Classification of Carbonate Rocks (Ed. W.E. Ham), Am. Assoc. Pet. Geol. Mem., 1, 108–121.
  2. Lokier, Stephen W.. (2016-12-01). "The petrographic description of carbonate facies: are we all speaking the same language?". Sedimentology.
Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

limestone
Want to explore this topic further?

Ask Mako anything about Packstone — get instant answers, deeper analysis, and related topics.

Research with Mako

Free with your Surf account

Content sourced from Wikipedia, available under CC BY-SA 4.0.

This content may have been generated or modified by AI. CloudSurf Software LLC is not responsible for the accuracy, completeness, or reliability of AI-generated content. Always verify important information from primary sources.

Report