Scope and Content

Notebook comprises entries on geological excursions in the vicinity of Bonn, Germany, 1887. Comprising contents page including details of excursions from Bonn via the rail network; notes of finding slates with andalusite and chiastolite mineral spots, indicators of thermal metamorphism (page 6); and a hand coloured geological sketch map of the Siebengebirge region (pages 16-17).

Administrative / Biographical History

Harker was concerned with the extrusive igneous (lavas and ash fall tuffs) and the Devonian slates of this part of Germany. The excursions included: Rolandseck, Rodenberg, Siebengeberge, Aarthal and a second return visit to Siebengeberge.

Geographical Names