Subject ASC0001hki
The Quarterly journal of the Geological Society of London.
v.5 (1849), Page 144 (1849)
Smithsonian Libraries
BHL Page 35268786
Keywords
mouth of Douro to Baltar Vallongo Section rock formation geology map diagram coast gneiss micaceous schist granite chloritic schist carbonaceous shale sandstone ferns trilobites clay-slate sienite carbonaceous deposit slate formation Rock formation geological strata Lower Silurian Formation Douro Baltar Geology Silurian Formation strata Fig 2. Section from the mouth of the Douro to Baltar (15 miles). section:Douro:Baltar section of earth