p.1

Geology of [Milwaukee County.] Wisconsin
1. [1844-48]

L. Pettibone's Quarry-S.W. 1/4 30-7-22

The limestone here presents itself in 3 points near the base of the Menominee river bluffs from which stone is quarried to fill the [piers?] of the harbor & other coarse work, and for the manufacture of lime which is of excellent quality & very white when plastered on a wall. One of the cliffs is about 30 ft high above the river which is here on a level with the Lake (Michigan). This limestone is very irregularly & confusedly stratified-full of small irregular cavities, occasioned by decay, fossels, and of mineral substance with which they were probably filled-or perhaps by shrinkage of particles during consolidation, or at the time of some disturbance of the strata by heat. The irregular layers appear to have a very great dip towards the N.E. appearing as if some uplift had acted [upon] from below acting on the S.W. side. These cavities are sometimes [occasioned/opened?] by the decay of shells, and other [illegible] remains leaving a cavity with their form.

Between the cavities the stone is very hard sometimes even giving fire while [getting?] out specimens with the chisel. It has a tendency to break into irregular angular fragments about 4 inches diameter which lie in great quantities at the base of the cliff where the workmen have been engaged quarrying stone . Appears quite like Vermicular Limerock of Eaton. On the north east slope of the principal cliff the surface of the rock has been smoothed and grooved by dilurial action. Course