Abundance: A = abundant; >10,000 specimens on a slide. C = common; 1001-10,000 specimens on a slide. F = few; 501-1000 specimens on a slide. R = rare; 11-500 specimens on a slide. T = trace; 1-10 specimens on a slide. B = barren; 0 specimens. Preservation of the radiolarian assemblage was based on the following categories: G = good; radiolarians show no signs of dissolution with only minor fragmentation. M = moderate; radiolarians show evidence of moderate dissolution with obvious fragmentation. P = poor; radiolarians show signs of a high degree of dissolution with very few intact specimens.