Abstract
Basal till in broken, low highlands of different drtail configuration is analysed (gravel counting with Cambro‐Silurian rock fragments as indicators, and determination of CaCOa). Several methodical questions, especially of the sampling, are discussed. As a part of the till, the Cambro‐Silurian far‐traveled material is spread out in a fan‐shaped way. But its distribution has not occurred uniformly. A clear dividing into main paths and lee areas is visible (Figs. 2–4, 6–8, 10–13). The plateaus have been obstructing elements to the glacial activity, and the valleys have been zones of a more unobstructed ice motion. Several divergences from this principal development exist due to special, topographical conditions, both having co‐operated with and counteracted each other. All facts point to a dividing into a real network of different ice movements, topographically controlled. As the latter show such a variability and local occurrence, perhaps have changed from time to time, and probably have been concentrated to the bottom layers of the ice, they are called secondary ice movements. Also distribution diagrams have been constructed, and especially those in semilo‐garithmic scale give considerable information of the till deposition and till homogeneity (Figs. 20–25). The character and the gradient of the distribution lines seem to be due to (1) the lithological composition of the till and the characteristics of the included material, (2) the topography and special divergences in it, and (3) the glacial activity and variations in its components. In spite of the influence of all these factors, the till distribution has occurred in such a regular manner as expressed by an exponential function. From this point of view, also this material is organized, at least in the direction of the general ice movement.