133845.pdf

88 H. A. ARMSTRONG & A. W. OWEN

Fig. 2. Constrained seriation matrix for the Avalonian shelf (Wales) for each of the time slices described in the

text. Source of locality data: (1) Savage & Bassett (1985): (2-7) Bergstrom & Orchard (1985), Bergstrom et al.

(1987): (8) Savage & Bassett (1985): (9) Savage & Bassett (1985); (10) Orchard (1980). Bergstrom & Orchard

(1985), Savage & Bassett (1985): (11) Bergstrom & Orchard (1985). Savage & Bassett (1985): (12-14) Orchard

(1980), Bergstrom & Orchard (1985). Localities have been located onshore (to the left) to offshore with

reference to Bevins et al. (1992). Shaded boxes indicate a presence: biofacies for generic associations have

been defined by blocks of generic associations and occurrences in previous time slices (see Fig. 6 and text for

explanation).

Results taxa, which range onshore to offshore or in the
data matrix have ranges that terminate onshore.
Biofacies architecture These biofacies include taxa considered to rep-
resent the North Atlantic Province (NAP) plus
Six biofacies have been identified. Oceanic Bio- many coniform genera. NAP taxa are known in
facies (OBI, OB2 and OB3) contain pelagic both low and mid-temperate latitude sections