1893. ] NEW YORK ACADEMY OF SCIENCES. ob, 
Johann Moberg has recently* described a Cambrian fauna 
from sandstones in Sweden, containing glauconite layers. One 
type of a rock was a greenish, mostly laminated, fine-grained 
blending of light-colored quartz fragments, small white mica 
scales and glauconite grains, the two latter especially plentiful 
in certain layers. Another type was a fine light blue-gray 
sandstone, with abundant quartz, scattered glauconite grains, 
and caleareous cement. ‘These rocks appear to be the same in 
character as the glauconite layersand quartzose sandstone of our 
Div. 1)? at Hanford Brook. No mention, however, is made of 
phosphate nodules, ; 
The presence of glauconite with the nodules suggests analogies 
to those found in the Cretaceous Greensands of England. These 
have been studied very thoroughly by Mr. W. Sollas}, Rev. 
Osmond Fisher{, and others. In the presence of sponge 
spicules, foraminifera, etc., and in the glauconite accompanying 
them, they show a great resemblance to ours. But the form is 
different, being irregular or finger-shaped, with usually a hollow 
centre. The spicules are Hexactinellid, and seemingly much 
more numerous, and are often connecied as if in place, which I 
have not been able to observe in any of ours, The English 
nodules are considered to be Ventriculite sponges, in which the 
organic matter has combined with and been replaced by phos- 
phate of lime. 
The Tertiary nodules of South Carolina are very variable in 
their character and, as mined, are mostly rolled and water- 
worn. They do not seem to be generally associated with 
glauconite. Some varieties contain abundant fossils, mostly 
shells ; others are dark and compact, with no fossils. With 
them are found ‘great numbers of bones and sharks’ teeth. 
They are generally irregular in shape, often in large flattened 
masses. Dr. Penrose§ considers that they are the result of the 
phosphatization of marly deposits, and that the nodular shape 
is due to the tendency of the phosphate to collect in 
concretionary forms. Dr. Shaler|| considers that their most 
probable mode of origin was by the aggregation of lime 
phosphate at the bottom of swamps. 
*Om en nyugptackt fauna i block af Kambrisk sandsten, insamlade af dr. 
N. O. Holst—Af J. C. Moberg (Aftryek ur Geol. Foren i Stockholm Forhandl., 
Bd. 14, Haft 2, 1892.) 
t Quart. Jour. Geol. Soc., London, Vol. XXIX., p. 76. 
+ Op. cit., p. 52. 
§ U. S. Geol. Survey, Bull. No. 46, p. 69. 
| Op, cit., introduction. 
