Rudstone
1. Rudstone/packstone
Grain-supported with carbonate mud matrix between grains; more than 10% of grains is > 2 mm. Skeletal grains include upper Cretaceous inoceramid bivalve prismatic shell and planktonic foraminifera.
Thin section kindly provided by T. Geel, Vrije Universiteit, Amsterdam
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2. Rudstone/packstone
Grain-supported with carbonate mud matrix between grains; more than 10% of grains is > 2 mm. Skeletal grains include upper Cretaceous inoceramid bivalve prismatic shell, planktonic foraminifera and crinoids.
Thin section kindly provided by T. Geel, Vrije Universiteit, Amsterdam
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3. Rudstone/grainstone
Grain-supported with cement (calcite spar) between grains; skeletal grains (Chaetetes calcareous sponge), intraclasts and peloids are abraded, with micrite envelopes and re-worked; more than 10% of grains is > 2 mm. The thin section is stained with alizarin red.
High Atlas, Morocco, cf. Merino-Tome' et al. (2012), Della Porta et al. (2013)
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4. Rudstone/grainstone
Grain-supported with cement (isopachous rims of marine radial fibrous cement and calci-mudstone as internal sediment of interparticle porosity) between grains; skeletal grains (coral fragments, calcareous sponges) are re-worked from a reef belt at platform margin; more than 10% of grains is > 2 mm.
High Atlas, Morocco, cf. Merino-Tome' et al. (2012), Della Porta et al. (2013)
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zoom image
![1.1.6.1 Rudstone/packstone Rudstone/packstone](https://carbonateworld.com/wp-content/uploads/2020/04/1.1.6.1.jpg)
Inoceramus bivalve
Planktonic foraminifer
![1.1.6.2 Rudstone/packstone Rudstone/packstone](https://carbonateworld.com/wp-content/uploads/2020/04/1.1.6.2.jpg)
Inoceramus bivalve
Crinoid ossicle
![1.1.6.3 Rudstone/grainstone Rudstone/grainstone](https://carbonateworld.com/wp-content/uploads/2020/04/1.1.6.3.jpg)
Aggregate Grain
Micrite coated
Chaetetes sponge fragment
![1.1.6.4](https://carbonateworld.com/wp-content/uploads/2020/04/1.1.6.4.jpg)
Radial fibrous cement
Geopetal internal sediment