326 
POPULAR SCIENCE REVIEW. 
gravel and sand, containing well rounded pebbles of primitive Primary and 
later Secondary rocks. 2. Till, a thick deposit of marl or brown clay, 
mixed with angular or rounded pebbles of various sizes without any order of 
deposition. 3. Beds of stratified fine rolled gravel and forest sand, often 
containing beds of clay or loam. 4. Deposits of gravel and sand, both 
stratified and unstratified, found in the beds of valleys and low lands adjoining 
rivers and brook courses. In addition to the above a bed of rich loam is 
frequently found in the valleys, covering the last named deposit. Still he 
thinks it very difficult to arrive at any satisfactory classification. In evidence 
of this opinion he gives the following section of the deposits at Broadstairs 
Colliery, near Hyde, which we confess it would be difficult , to classify 
satisfactorily : — 
ft. 
in. 
ft. 
in. 
1. 
Clay 
. 11 
0 
8. Quicksand and Loam . 
6 
0 
2. 
Quicksand 
. 2 
6 
9. Gravel .... 
3 
0 
3. 
Strong Marl . 
. 22 
6 
10. Loam .... 
7 
6 
4. 
Quicksand 
. 2 
6 
11. Gravel and Sand . 
3 
0 
5. 
Loam with Pebbles 
. 12 
6 
12. Clay and Loam 
15 
6 
6. 
Buck-leaf Marl 
. 19 
0 
13. Gravel and Soft Marl 
7. 
Dry Sand 
. 9 
0 
containing Pebbles . 
10 
0 
Local Sandstones. — At a late meeting of the Geological Society of Glasgow 
Mr. J. Wallace Young read a paper on this subject, in which he expressed 
the following conclusions : 1. That in the greater number of sandstones 
examined, the cementing material consisted of carbonates. 2. That very 
considerable quantities of the carbonates of iron and magnesia frequently 
accompanied the carbonate of lime, although no definite ratio seemed to exist 
between them. 3. That these sandstones were harder the greater the pro- 
portion of carbonates they contain. 4. Mica was found to be present in 
nearly all those examined, and, with one exception, was of the white variety. 
5. Soluble silicates were only found in three varieties, in any quantity, all 
three belonging to the Old Red Sandstone ; 6. That the different shades of. 
colour seen in those sandstones belonging to the last-mentioned rocks 
appeared to be due solely to the peroxide of iron, and that the white rings 
and spots so often observed have resulted from the reduction and subsequent 
removal of the greater part of this iron. 
Hungarian Oligocene Deposits. — Herr Hantken has presented a paper to the 
Viennese Geological Institute on the subject of some oligocene strata which 
have recently been exposed in a shaft sunk at Sarisap in Hungary. The 
strata are about 160 feet thick, and are of marine and brackish origin. The 
beds due to the latter are composed of a sandy plastic clay, containing shells 
and seeds of Char a. The marine strata overlie the brackish water ones, a 
bed of clay intervening between the two : 60 feet of sandstone are above the 
clay, and contain the remains of Echinidce. 
Cycadoidia Yatesii is the name given to a newly discovered cycad, which 
has been carefully examined by Mr. Carruthers of the British Museum. 
The specimens from which the description has been given, were found in the 
iron and green sands of Potton which rest on the Kimmeridge and Oxford 
clays and are covered by the Gault. The specific name has been given in 
compliment to Mr. Yates, whose name is well and favorably known in con- 
