Carbonate Rock Classification

Packstone

1. Packstone

Grain-supported; carbonate mud matrix between skeletal grains (dasyclad algae, benthic foraminifera, bivalves) in interparticle pore space.",

Thin section kindly provided by T. Geel, Vrije Universiteit, Amsterdam

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2. Wackestone to Packstone

Grain-supported; carbonate mud matrix in interparticle space (possibly effect of compaction from wackestone to compacted packstone) among Miocene planktonic foraminifera.",

Thin section kindly provided by T. Geel, Vrije Universiteit, Amsterdam

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3. Packstone

Grain-supported; carbonate mud matrix in interparticle space. Grains are oncoids made of coralline red algae (rhodoids) and skeletal fragments (serpulid worm tubes, bivalves, ostracods).

Thin section kindly provided by T. Geel, Vrije Universiteit, Amsterdam

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4. Packstone

Grain-supported; carbonate mud matrix in interparticle space between skeletal grains (charophytes algae oogonia).",

Thin section kindly provided by T. Geel, Vrije Universiteit, Amsterdam

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5. Packstone

Packstone of resedimented micritic ooids, aggregate grains and intraclasts. This packstone was depositied as a deep-water apron with ooids shed from a nearby platform margin.

Middle Jurassic, Cutri, Mallorca, Spain

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6. Packstone/Grainstone

Skeletal packstone-grainstone with gastropods and bivalves and micritic vadose meniscus cement followed by blocky sparite.

Jurassic, UK

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7. Condensed packstone

Grain-supported, diagenetic texture due to compaction and pressure solution with partial grain suturing: some grain contacts are microstylolites; between grains there is micrite matrix. Skeletal grains are large benthic foraminifera (nummulitids, discocyclinids), coralline red algae, echinoderms and bryozoans.

Thin section kindly provided by T. Geel, Vrije Universiteit, Amsterdam

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Dasyclad Alga Actinoporella

Benthic Foraminifera

Wackestone to Packstone

Planktonic Foraminifera

Packstone

Red coralline Algae Oncoids

Serpulid

Packstone

Charophytes Algae

Packstone
Packstone/Grainstone

Gastropod

Meniscus vadose Cement

Condensed packstone

Nummulites filled by glaucony

Sutured grain contacts

Packstone

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Dasyclad Alga Actinoporella

Benthic Foraminifera

Wackestone to Packstone

Planktonic Foraminifera

Packstone

Red coralline Algae Oncoids

Serpulid

Packstone

Charophytes Algae

Packstone
Packstone/Grainstone

Gastropod

Meniscus vadose Cement

Condensed packstone

Nummulites filled by glaucony

Sutured grain contacts