Comparison of Tidalites in Siliciclastic, Carbonate, and Mixed Siliciclastic-Carbonate Systems: Examples from Cambrian and Devonian Deposits of East-Central Iran

Table 2

Comparison of sedimentary structures in the siliciclastic, carbonate, and mixed siliciclastic-carbonate tidalites. For more details see text.

Sedimentary structures; and fabrics	Siliciclastic tidalites (Top Quartzite Unit)	Mixed tidalites (Padeha Formation)	Carbonate tidalites (Deranjal Formation)	Petrofacies	Microfacies
Normal graded bedding	✓ ✓✓	✓ ✓✓	✓ ✓	Qtz and Lit	Grst
Intraformational clasts	✗	✓	✓ ✓✓	Qtz	Intra Grst
Scour pits	✓ ✓	✓	✓	Qtz and Lit	Grst
Wavy ripples	✓ ✓✓	✓ ✓✓	✓ ✓	Qtz and Lit	Grst-Pkst
Current ripples	✓ ✓	✗	✓	Qtz and Lit	Wkst and Dol
Interference ripples	✓ ✓✓	✓	✗	Qtz and Lit	✗
Climbing ripples	✗	✗	✓ ✓	✗	Grst-Wkst
Trough cross-beds	✓ ✓	✓	✓	Qtz and Lit	Grst
Planar cross-beds	✓ ✓✓	✓ ✓✓	✓	Qtz and Lit	Grst-Pkst
Herringbone cross-beds	✓ ✓✓	✓ ✓	✓	Qtz	Grst-Pkst
Hummocky cross-beds	✗	✓	✗	Qtz	✗
Reactivation surfaces	✓ ✓✓	✓ ✓✓	✓	Qtz and Lit	Grst
Flaser bedding	✓ ✓✓	✓ ✓✓	✓ ✓✓	Qtz and Stst	Grst-Pkst
Wavy bedding	✓ ✓✓	✓ ✓✓	✓ ✓	Qtz and Stst	Grst-Wkst
Lenticular bedding	✓ ✓✓	✓ ✓✓	✓	Stst and Qtz	Dol
Polygonal mudcracks	✓ ✓✓	✓ ✓	✗	Stst and Clst	✗
V-shaped mudcracks	✓ ✓✓	✓ ✓✓	✓	Stst and Clst	Dol
Syneresis cracks	✗	✓	✗	Stst	✗
Raindrop imprints	✓	✓	✗	Stst and Clst	✗
Salt casts	✗	✓ ✓	✗	✗	Dol
Pseudomorph calcite	✗	✓	✓	✗	Dol
Entrolithic folding	✗	✓	✗	✗	Gyp and Any
Stromatolite structures	✗	✓ ✓	✓ ✓✓	✗	Dol and Bdst
Tepee structures	✗	✓ ✓	✓	✗	Dol
Fenestral fabric	✗	✓	✓	✗	Dol
Tracks and trails	✓ ✓	✓ ✓	✓ ✓	Qtz and Stst	Grst-Wkst

Absent (✗) → Very common (✓ ✓✓),  Lit: litharenite, Grst: grainstone, Dol: dolomudstone, Intra Grst: Intraclastic grainstone (pebble size), Stst: siltstone, Pkst: packstone, Gyp: gypsum, Bdst: Boundstone, Qtz: quartzarenite, Clst: claystone,Wkst: wackstone, Any: anhydrite.