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Table 3 Petrographic features of the tested sandstones by thin-section analysis

From: Experimental study on capillary water absorption of sandstones from different grotto heritage sites in China

Sample Composition Texture
Primary minerals Lithic fragments Interstitial materials Microstructure Grain size range
(Min–max, μm)
Shape
YG Quartz, K-feldspar, mica Siliceous rock, rhyolite, metamorphic argillaceous rock Clay matrix,
calcareous cement
Grain supported,
Pore-filling cementation
90–2000 From sub-rounded to sub-angular
DZ Quartz, K-feldspar, plagioclase, mica Siliceous rock, siltite, micrite, argillaceous rock, rhyolite 20–350 Sub-angular
LS Quartz, K-feldspar, plagioclase, mica Siliceous rock, argillaceous rock, siltite, micrite, sericite slate 16–710 From sub-rounded to sub-angular