288 * Organic Remains of the 
Art. X.—Supplement to the “ Synopsis of the Organie Remains of 
the Ferruginous Sand Formation of the United States,” contained 
~ Vols. XVI and XV IL of this Journal ;* by 8. G. Morrow, 
“M.D., &e. | ‘a 
‘Waen my attention was first called to this subject, eight years ago, 
I could not trace the marl region beyond the peninsula of New Jer- 
sey and a small part of Delaware: subsequently, however, it has 
been discovered in almost all the Southern States, and I now believe 
it to be one of the most extensive formations on this continent. 
Its localities in New Jersey, Delaware and Maryland have been 
so often referred to, that I shall not recur to them ; but for the pur- 
pose of exciting the observation of tourists, and others, in the South- 
ern States, it may be well to notice the green sand districts. which are 
dy ascertained to exist there. qr Bie 
3 North Carolina.—At Ashwood, near Cape Fear river, on the 
authority of Mr. Vanuxem. 7 dad 
South Carolina.—At Effingham’s Mills, on Lynch’s ereek, on the 
authority of Dr. Blanding, who has brought me a number of char- 
acteristic fossils; also at Mars’s Bluff, on Pedee river, and at Nelson’s 
ferry, on the Santee river, tas oe 
Georgia.—Near Sandersville, where it is chiefly recognized by 
Belemnites. : 
Alabama.—My friend Dr. Pitcher, U.S. A., informs me that he 
has traced the ferruginous sand all the way from Portland to Mont- 
gomery, a tract which embraces Cahawba, a locality already quoted 
by me, on the authority of Mr. Nuttall. 
Mississippi—This State has an extensive marl tract in the Chick- 
asaw fields, near the borders of Tennessee. The characteristic 
fossils have been sent to me by my friend Mr. Brewster. s 
Tennessee.—The south western portion of ‘Tennessee presents @ 
continuation of the tract just mentioned, which takes a westerly di- 
rection across the Mississippi river at the Chickasaw Bluffs. : 3 
_Louisiana.—Dr. Pitcher, in a recent letter, describes an exten- 
sive deposit of ferruginous sand between Alexandria and Nachitoches- 
Judge Bry has also noticed it near the township of Wachita, on the 
Wachita river, where it is recognized by Belemnites, Ammonites and 
Gryphee. ; ; 
3 Se 
* See also a letter to the Editor, Vol. X XII, p. 90. 
