File:Packstone.svg

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Summary

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Description
English: Schematic packstone as seen in thin section under the petrographic microscope.

Type of carbonaceous rock according to the depositional texture:

  • Alloctonous carbonates - Original components not bound at the deposition time.
  • Less than 10% of components larger than sand size (> 2 mm)
  • Contains carbonate mud (micrite, silt/clay size <63 μm)
  • Fabric supported by the grains of the sand fraction (63 μm - 2 mm)

Legend:

  • Dotted background: micritic matrix.
  • Curved blue particles: bioclasts (indeterminate fossils, eg bivalve fragments).
  • Blue cones: bioclasts (eg fossils of gastropods).
  • Blue circles: oolites / ooids.
  • Black spheroids: bioclasts (pellets).
Based on: Dunham (1962), Embry & Klovan (1971) and Lokier & Al Junaibi (2016) (for full references see below)
 
Español: Esquema de una caliza packstone vista en lámina delgada al microscopio petrográfico.

Tipo de roca carbonática según la textura deposicional:

  • Carbonatos alóctonos - Componentes originales no unidos en el momento de la deposición.
  • Menos del 10% de los componentes mayores que el tamaño arena (>2 mm)
  • Contiene fango carbonático (micrita, tamaño limo/arcilla <63 μm)
  • Fábrica soportada por los granos de la fracción arena (63 μm - 2 mm)

Leyenda:

  • Con trama de puntos: matriz micrítica.
  • Partículas azules curvas: bioclastos (fósiles indeterminados. P.ej. fragmentos de bivalvos).
  • Conos azules: bioclastos (fósiles de gasterópodos).
  • Círculos azules: oolitos/ooides.
  • Esferoides negros: bioclastos (pellets).

Basado en:

Date
Source Own work
Author PePeEfe

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current19:12, 23 January 2017Thumbnail for version as of 19:12, 23 January 2017744 × 645 (282 KB)PePeEfe (talk | contribs)User created page with UploadWizard

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