[1] Ripple marks are often seen on the surface of wind-blown sand, but the other features of this sandstone show that this was not its mode of accumulation.
[2] Irving: "The Baraboo Quartzite Ranges." Vol. II, Geology of Wisconsin, pp. 504-519. Van Hise: "Some Dynamic Phenomena Shown by the Baraboo Quartzite Ranges of Central Wisconsin." Jour. of Geol., Vol. I, pp. 347-355.
[5] There is an admirable exposition of this subject in Gilbert's "Henry Mountains."
[6] It is not here asserted that these notches were as deep as now, in pre-Cambrian time. It is, however, certain that the quartzite was deeply eroded, previous to the deposition of the Potsdam sandstone.
[7] An account of loess in connection with the drift of the last glacial epoch is given in the Journal of Geology, Vol. IV, pp. 929-987. For a general account of loess, see Sixth Annual Report of U. S. Geological Survey.
[9] The moraine line on the map represents the crest of the marginal ridge rather than its outer limit, which is slightly nearer the lake margin. Stratified drift of the nature of overwash also intervenes at points between the moraine and the lake border.
[10] The preglacial course was probably east of the present in the vicinity of Kilbourn City.
