animals. The most characteristic of eurypterid rocks is the waterlime.[1] It is in this that the faunas of Kokomo and of the Bertie waterlime of New York are contained. How close is this association of eurypterids and waterlime, is shown by the fact that with the recurrence of waterlime formation (Rondout) in the Salina section after the close of the salt deposition and the Cobleskill dolomitic limestone stage, Eurypterus reappears, though much diminished in number, and later again, after the introduction of the Manlius fauna the upper waterlime bed of the Manlius brings back a single species (E. microphthalmus). The section at Manlius given by Hartnagel[2] [1903, p. 1165] illustrates well the intimate connection of waterlimes with eurypterids on one hand and the intercalation of limestones with Stromatopora and brachiopods on the other.
- ↑ The appended analysis of the Buffalo waterlime or cement rock, kindly furnished by Mr Lewis J. Bennett of Buffalo, shows the peculiar composition of this strongly magnesian limestone:
Silica 11.48 Iron .90 Alumina 17.50 Carbonate of lime 42.75 Magnesia (carbonate) 20.35 Potassium 1.00 Sodium .80 Combined water and loss 5.22 - ↑
GENERAL SECTION AT MANLIUS, ONONDAGA COUNTY
Top Feet 1 Oriskany. Fossiliferous sandstone 5–2 2 Helderbergian. Gray, compact fossiliferous limestone 6 3 Helderbergian. Blue limestone beds 14 4 Helderbergian. Stromatopora beds, upper portion much broken 12 5 Helderbergian. Blue limestone, fossils rare 14 6 Manlius. Upper waterlime bed. Eurypterus at Split Rock 4 7 Manlius. Blue limestone with Spirifer vanuxemi and Leperditia alta 4 8 Manlius. Lower waterlime bed 4 9 Manlius. Stromatopora bed at top. Blue layers below containing typical Manlius fauna 65
