Sandstone Photos

Figure 7 Near-vertical sandstone wedge remaining from fill of ice wedge penetrating the Cattle Grid Breccia (680 Ma), in the Mt. Gunson Mine, South Australia (photo courtesy of G. E. Williams).

A Plate 5. Morphological features of kaolinite (dickite) and chlorite, a, b Kaolinite c, d dickite with well-developed crystal faces and of large size (up to 10 pm and above) c-h authigenic chlorites developed in the pore space of sandstones frequently in the form of films or as encrusted fringes around quartz grains. Note that photo g exhibits two chlorite varieties of different origin... 

Plate 11. Carbonate cement in sandstones which suffered intense solution by acids. Note that the carbonate cement in photo c undergoing dissolution is of secondary authigenic origin... 

Fig. 11.13 Glossopteris leaves in Permian sandstone of the Beaon Supergroup in the Transantarctic Mountains (Photo by T.N. Taylor and E.L. Taylor, reproduced with permission. This image was published in Paleobotany by Thomas N. Taylor, Edith L. Taylor, and Michael Krings, second edition. Figure 14.174, p. 6(X). Copyright Elsevier, 2(X)9)...

Fig. 12.2 Outcrop of Mawson Diamictite in the Allan HUls. The rocks of this formation are unstratified and are composed of dolerite and sandstone clasts in a fine-grained matrix that contains zeolites and other products of hydrothermal alteration (Photo by G. Faure)...

Fig. 19.5 (a) Mount Sirius in the Beardmore Glacier area (Figs. 11.8 and 11.9) is a mesa composed of sandstones of the Beacon Supergroup overlain by an intrusive sill of the Ferrar Dolerite. The summit consists of a massive deposit of Neogene till which is the type example of the Sirius Formation as originally defined by Mercer (1972). The elevation of Mt. Sirius is 2,300 m above sea level compared to 2,000 m on the Walcott Ndvd (Photo by G. Faure). (b) The Neogene lodgement till on the summit of Mt. Sirius was... 

Fig. 19.8 The Meyer Desert Formation of the Sirius Group in the Dominion Range has a fine grained yellowish-tan matrix of sand, silt, and clay that encloses angular boulders of dolerite of the Ferrar Group and of sedimentary rocks of the Beacon Supergroup. This facies of the glacial deposits closely resembles the diamictite on Mt. Sirius in Fig. 19.5b. However, the section in the Dominion Range also includes thin bedded and well-sorted fluvial and lacustrine sandstones and sUtstones that formed in peiiglacial environments that existed between episodic advances of the East Antarctic ice sheet during the late Pliocene (Photo by G. Faure)...

---