SEDGWICK, Adam & Roderick Impey MURCHISON. A sketch of the structure of the Eastern Alps; with sections through the newer formations on the northern flanks of the chain, and through the tertiary deposits of Styria etc. Geological Society of London. 1835.
4to. Recently bound on cream cloth-backed paper-covered boards; pp. 301 - 420, 1 folding hand-coloured map, 2 folding plates (1 hand-coloured), 3 other plates; very good indeed.
Offprint from the Transactions of the Geological Society of London. This is the most substantial work to arise from Sedgwick and Murchison's trip to Alps in in 1829, which was itself one of the most extensive collaborations of their ill-fated friendship. This was an important paper in that it showed the extent of the Alpine limestone, which Sedgwick was able to correlate with strata in northeastern England, and the whole thrust of their argument is to do with stratigraphical continuity. Their main concern is to bridge the apparent faunal gap between secondary and tertiary strata, a concern that would later lead them to identify their rival systems.