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GEOLOGY OF THE FIRST DISTRICT. 
3. The banks of the Norman’s kill, one and a half or two miles from Albany, below the 
bridge on the road to Schoharie. They are here extremely abundant, and well defined. 
4. Baker’s falls, a little below Sandyhill. Baker’s falls is a locality worth visiting by every 
geologist. Here a thickness of thirty feet or more of the slate rock is so filled with 
these impressions, that the thinnest layer can scarcely be split off, without exposing 
a surface almost covered with them. Bands of iron ore (carbonate of iron), and veins 
of crystalline carbonate of lime, may be seen in the same rock. The best locality 
for examining these fossils is just below the falls, perhaps one hundred yards below the 
mill on the left bank. The rock that is weathered, shows them very indistinctly, but 
the sound unaltered rock yields beautiful specimens. 
At a little distance below the ferry on the Saratoga shore, at and near the sawmill, 
the junction of the slate and Trenton limestone, and the graduation of one into the 
other by interstratification, with their numerous and beautiful fossils, which are inter¬ 
mingled near their junction, can easily be examined when the river is low. The trilo- 
bite, the Nuttainia concentrica of Eaton, is extremely abundant; and on one specimen 
of a thin band of limestone six inches square, from the slate, were no less than ten of 
these trilobites, some of which were entire, and one of the Triarthus heckii. 
At the falls, opposite the locality already described on the left bank, the graptolites 
are as abundant as on the other side of the Hudson ; but the strata on the left bank 
are upturned, and dip at a high angle to the east, while the strata on the right bank are 
nearly horizontal. 
5. On the shore of the Hudson in the northwest corner of Stuyvesant, Columbia county, 
beautiful specimens of graptolites were obtained from the black slate, a little distance 
above the brick-kilns. Two strata of the black slate, three or four feet thick, separated 
by a stratum of slate, are filled with them. 
6. They occur also at Hudson, in the slate rocks below the Pavilion, between the steam¬ 
boat landing and the point at the north end of the town. 
7. The most beautiful and brilliant specimens were found at what is called the Coal mine, 
about one and a half miles south of Hudson, in the black slate. The fossils here are 
so brilliant as to be almost specular, are perfectly defined in the most minute markings, 
and are composed of a thin film of anthracite. 
8. These fossils are also seen in the slate rocks at the lower falls of the Kinderhook creek, 
and a small trilobite was also found at this place in the slate. 
9. They were seen also abundantly in the black slate of the Shawangunk mountain, about 
one and a half miles east of Ellenville, on the sides of the road over the mountain, 
where rock excavations had been made at the height of five hundred to seven hundred 
feet above the valley. 
10. They occur also at Blue rock in Marlborough, on the bank of the Hudson. 
Many other localities might be named, but the above are sufficient to illustrate the various 
species found. They will be figured and described in the Palaeontological Report. 
