Magmatism in the Netherlands: expression of the north-west ... - KNAW

Fig. 3. Stratigraphic overview of younger Paleozoic and
Mesozoic, radiometrically dated igneous and volcaniclastic
rocks in the Netherlands and adjacent NW European areas
(see Table 1 for references).
200 Magmatism in the Netherlands > M.J. van Bergen & W. Sissingh
from depths between 1200 and 4500 m, and about 30%
were dated radiometrically (Table 1, Fig. 3). Most of the
dated and undated rocks are intrusives. Because original
petrographic descriptions are sometimes lacking or inconclusive,
some rocks were only classified as lava if their ra-