Queries by the Geologists of the Survey of New York. 125 
18. Do the rocks shew distinct lines of demarkation, or do they ~ 
gradually blend into each other? 
19. At the junction of trapean and granitic rocks with others, are 
there any evidences of former high temperature, such as sublimation 
of sulphur into cavities, cokeing of coal, apparent fusion of the rock, 
a vesicular texture, or other appearances which are familiar to the 
mind, where the bodies have been heated ? 
20. Where masses of granitic or trapean rocks occur in situ, can 
any connection be traced between these and dykes or veins of simi- 
lar materials which traverse the adjacent rocks ? 
Sands. 
1. Are there beds of fine white sand, which contain no black, or 
red, or yellow grains? 
.2.. Has it ever been used for making glass, or for other purposes ? 
3. Are there beds of red or black sand washed upon the beach? 
4. Are these sands abundant enough for purposes of commerce ? 
©. Have they ever been used as iron ores, or as a-substitute for 
emery, or for blotting sand? 
6. Is the general surface of the country sand, clay or loam? 
7. Do these substances form alternating regular layers? 
S. Does the sand on the surface of the country drift by the wind ? 
9. Have any farms been thus materially injured ? 
10. Have buildings, trees, hedges, fences, or walls been covered 
from this cause ; or marshes or ponds made dry land? Do the 
sands progress in any particular direction, and at what rate per 
annum ? 
11. Is the sand in any locality hardened into a sandstone ? 
12. Is sand washed along shore by currents, and deposited in 
new situations ? 
13. Are any islands, sand-bars, spits, shoals, or beaches, known 
to have been thus formed ? 
14. Have islands been connected with each other, or with the 
main land, by bars, spits, or beaches ? 
15. Hane islands or coasts been washed away entirely, or in pat, 
by the action of the sea? 
16. Where cliffs have been undermined, and have tumbled down, 
what kinds of earth, or rock, were exposed ? 
17. Were they arranged in layers? 
18. Were bones, shells, bits of wood, or lignite imbedded in 
them? 
