Paul van den Bogaard's scientific contributions

Publication (1)

Four isolated occurrences of Tertiary volcanic rocks in the northern Spessart at Beilstein, Hoher Berg, Madsteinand Kasselgrund are relics of volcanic vents or dikes. They display alkaline basalts (s.l.) with mainly trachybasalticcomposition, which, from normative mineral contents, may be designated as nepheline-bearing alkali-olivine basalts andba...