By Juergen Schieber, Pradip K. Bose, P.G. Eriksson, Santanu Banerjee, Subir Sarkar, Wladyslaw Altermann, Octavian Catuneanu
Drawing on a mixture of contemporary occurrences and sure historic opposite numbers, this atlas is a treatise of mat-related sedimentary positive factors that one may perhaps count on to determine in old terrigenous clastic sedimentary successions. by means of combining sleek and historical examples, the relationship is made to most probably formative strategies and the usage of those positive aspects within the interpretation of historic sedimentary rocks.
* the 1st complete compilation of microbial mat features/structures preserved within the sliciclastic rock record
* top of the range, complete colour pictures totally aid the text
* sleek and old examples attach the formative procedures and usage of mat-related positive aspects within the interpretation of sedimentary rocks
Read or Download Atlas of Microbial Mat Features Preserved within the Siliciclastic Rock Record, Volume 2 (Atlases in Geoscience) PDF
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Extra info for Atlas of Microbial Mat Features Preserved within the Siliciclastic Rock Record, Volume 2 (Atlases in Geoscience)
Reineck et al. (1990) termed the latter ‘gamma-petees’ (Figure 2-4-4F) and defined them as intermediate between petees and tepees due to the same underlying process. Expansion of surface crusts may also cause cracking and subsequent movement of the cracked crusts against each other (Figure 2-4-4F). , 1990). Gamma-petees evolve from the same processes, but in the presence of biogenic matrices which smooth sharp-edged overthrust structures. Tepee and gamma-petee structures may be characteristic of higher-lying sabkha flats (Figure 2-4-4G).
Photo: K. Dunajtschik-Piewak; modified after photo published in Gerdes et al. (1994a). (D) Watercovered microbial bulges marking polygonal cracks. Photo: K. Dunajtschik-Piewak. (E) Irregular surface patterns due to the bulging growth of mats as a reaction to cracking and subsequent flooding. Some individual mat fragments partly flipped-over. Photo: K. Dunajtschik-Piewak. (F) Extraordinarily thick polygonal bulges within abandoned salina basin. Prolonged periods of overstanding calm and warm seawater alternating with shorter periods of drying may have produced these growth structures (pencil 17 cm long).
Results are homogeneous white layers covering the mat surfaces as indicated in Figures 2-2-2F to -2-2H. Surface sealing by mats interacting with post-burial gas production (Figures 2-4-2 and 2-4-3) Fenestral fabrics (Figure 2-4-2) are closely related to the deformation of primary fabrics and cohesive bedding planes owing to the pressure of gas released from deeper buried organic matter. , 1997b). Fenestrae arranged concordant to biolaminites (Figures 2-4-2A, -4-2C, -4-2D) are a consequence of the sealing effect of buried mats, connected with compaction of subspherical gas bubbles (Flügel, 2004).