1 I ! GEOLOGK \l. REPORT. [1221, 222. 22; 



CORALS. 



Ook. Lunuliti • Vicltsburgensis, Con. 



Mud i, - Lunulites sp. 



Twr/*/ Con Orbitoides Mantelli. 



221. Further than at Vicksburg itself, I have not as yet examined the forma- 

 tions of Warren county, and can state only what I have heard. — N. E. of 

 Vicksburg, on the Yazoo bluff, as well as in ravines (which are deeply cut into 

 the Bluff formation), the Vicksburg strata frequently appear up to llaynes' 

 Bluff on the Yazoo, according to Prof. Wailes. I am not aware, however, that 

 they appear anywhere S. of Vicksburg, nor on the line of the Southern R. R., 

 west of Big Black River. Outcrops exist on the latter stream, above the rail- 

 road crossing, in Binds county ; of these, however, I have no personal 

 knowledge. A specimen of very sandy, greenish marl, containing Vicksburg 

 fossils, was collected by Prof. Wailes near Amsterdam, on the Big Black. At 

 Brownsville, the Vicksburg strata crop out in the town, where a spring issues 

 from beneath a ledge of blue limestone containing Area Mississippiensis, 

 Orbitoides, Pecten Poulsoni, and others ; it is overlaid by calcareous glauconitic 



sand with Pecten Poulsoni, Ostrea Vicksbwrgensis, and casts, the whole obvious- 

 ly corresporo I i i i u to adjacent portions of beds Xos. 5 and 6 of the Brandon 

 profile. 



222. The blue limestone crops out on Baker's Creek a few miles below 

 Bolton's Depot ; at Steward's quarry, 3 miles \V. of Clinton, where specimens 

 of Panopaea oblongata, Clypeaster, and Serpula, were procured by Prof. Wailes ; 

 also a specimen of sandy marl containing Area Mississipjneyisis and Conus 

 tauridens. It is found moreover at Marshall's quarry near Mississippi Springs, 

 where impressions of Crassatella Mississippiensis, Cardium diversum, Panopaea 

 oblongata, Pinna argentea, Tarritella Mississippiensis, a large Phorus, and 

 Schimster, as well as a small lenticular mass of fossil resin were collected by 

 the same. Two specimens of a very large Pinna, not seen elsewhere, have been 

 found by Mr. Marshall. 



It is also found about nine miles S. of Jackson, on Pearl River ; and about 3 

 miles S. of Byram Station, near the R. R., where it occurs in disjointed, cavern- 

 ous blocks rather than in a solid stratum. 



223. The banks of Pearl River at and above Byram Station, as well as the 

 bed of the creek close by, exhibit fine outcrops of bluish marls with finely 

 preserved shells, for obtaining which this is a very eligible locality. A section of 

 this outcrop, and an analysis of one of the marls occurring there, will be found 

 further on (If 280). 



About half a mile further up, instead of the uniform strata of marl seen i» 

 the bluff at Byram, we obtain the following section — corresponding, no doubt, 

 to strata somewhat lower than thoso at Byram. 



