1867.] 



TATE — SOXTTH-AFEICAN- FOSSILS. 



149 



c. Synopsis of the Uitenhage Series. 



The Jurassic strata are well seen in the Uitenhage district, and 

 may therefore with propriety be designated the " Uitenhage Forma- 

 tion " for convenience of reference. They are exposed by the rivers 

 traversing the several basins of these rocks in the Eastern Province, 

 especially in the upper part of the Bushman River, and the lower 

 parts of the Sunday's, Koega, Zwartkop, and Gamtoos Eivers. The 

 strata differ somewhat in the several basins. The following com- 

 parative Table of this Uitenhage series has been compiled chiefly from 

 Dr. W. G. Atherstone's ^' Lecture on the Geology of Uitenhage," in 

 the 'Eastern Province Monthly Magazine,' vol. i., 1857. 



Zwartkop JRiver. Sunday's Eiver. Bushman River. 



3. Tellowisli sand (green- 3. G-reenisli-grey, caleare- 3. Eed, purple, and yel- 



grained) and calcareous ous, sandy, green-grained, low marls and clays (130 

 rock, with, some bands made fossiliferous rock (some- feet and more). 

 up of fossils (upwards of times limestone, sometimes 

 100 feet thick, Krauss*). sandstone %). 



ft. in. 

 Disintegrated rock ... 12 

 Hard ferruginous rock, 



Tery rich, in fossUs 



(Trigonia&c) 1 6 



Sandstone 16 4 



Sandstone : fossils ...16 



Sandstone 16 



Grreyish. sandstone 



(all tlie sandstones 



of this series are 



more or less glau- 



conite): fossUs in 



its lowest beds 60 



Trigoniaband 4 



2. {d and c?. Lignite at 2. d. Light-brown sand- 2. Brown pebbly green- 



Bethelsdorp, &c.). stone, with lignite, jet, am- grained sandstone, with. 



b. Fossiliferous dark fer- ber, and large reptilian numerous prostrate tree- 

 ruginous sandstone f (Os- bones, c. G-rey sandy beds, trunks (some calcareous, 

 trea &c.), in bands a few with, upright trunks of coni- some lignitic), dx-ifted and 



inches thick, alternating ferous trees, and leaTes of bored by Gf-astrochaena, and 

 with, saliferous shales and Zamiae and Ferns, and con- bones of great Eeptiles, in- 

 sandstonesj (Atherstone). taining two blue argillo-cal- eluding one with teeth like 



Friable grey sandstone careous bands, rich with those of the Iguanodon. 

 (alternating with ferrugin- Ferns, also thin seams of This is the " Wood-bed 

 ous nodular bands, 1 foot lignite, b. Thin oyster- series" of Atherstone, and 

 thick), 20 feet. G-reyish bands, alternating with thin is here perhaps 500 feet 

 hard band, full of small sandstones and saliferous thick. 

 Shells, mostly crushed, such shales, with gypsum, a. 

 as Dentalium, Turritella, Hard grey and brown sand- 

 Ostrea, I^ucula, and As- stone. This part of the 

 tarte(?),with Cidaris spines : formation (2 a-d) is the 

 3 or 4 inches §. " Wood-bed series," as seen 



a. White and variegated at G-eelhoutboom, where the 

 sandstone [i (in the upper AVitwater joins theSunday's 

 part of the Zwartkop Ri- Eiver. 

 ver). The " Zwartkop Sand- 

 stone" of Atherstone. 



1. Quartzose pebbles, 1. The " Enon Conglome- 1. The "^no)!, Conglome- 



loosely packed in red clay rate" lying unconformably rate," unconformable on the 

 and sand, 300 feet. The on old slates and schists. old schists **. 



"Enon Conglomerate," Ath- 

 erstone. Unconformable on 

 quartzite and schist. 



* Quart.} Journ.j Geol. Soc. vol. vii. Miscel. p. 121, a translation from the Xova Acta 

 Acad. Carol.-Leop. vol. xxi. part 2. p. 439 et seq. See also Trans. G-eol. Soc. 2nd ser. vol. vii. 

 p. 201. f On the Koega Eiver also. 



I This is the rock termed "Lowest Strata of the Zwartkop Crag" in the Trans. Geo!. Soc. 

 2nd ser. vol. vii. p. 203. § Krauss, loc. cif. 



II Also on the Gamtoos Eiver. These sti-ata, 2 a, of the upper part of the Zwartkop basin 

 may be equivalent to a portion of 2 6 of the lower part of the river. 



f See Trans. Geol. Soc. 2nd ser. vol. vii. p. 201. These beds (" Ifo. 3 ") and their equivalents 

 may be termed the " Trigonia-beds." 



** Mr. Bain's section and remarks at p. 58, vol. vii. of Trans. G-eol. Soc. 2nd ser., appear to 

 point also to this conglomerate, and some overlying portion of the " Wood-bed series," in 

 Lower Albany, north. of the Bushman Eiver. 



