Abstract
New occurrences of Middle Cambrian polymeroid trilobites from the Henson Gletscher and Kap Stanton formations of Nyeboe Land, and the Kap Stanton Formation of Peary Land, North Greenland, are documented here.
Highlights
Middle Cambrian strata of northernmost North Greenland contain polymeroid trilobites of Laurentian and Baltic aspect
New occurrences of Middle Cambrian polymeroid trilobites from the Henson Gletscher and Kap Stanton formations of Nyeboe Land, and the Kap Stanton Formation ofPeary Land, North Greenland (Fig. 1), are documented here
Trilobites from these areas were collected by staff of the Geological Survey of Greenland (GGU) and are relatively abundant and diverse (Table l)
Summary
Aspect are present along the northem coast of Greenland in Nyeboe Land and Peary Land (Poulsen, 1969; Fletcher et al, 1988; Babcock & Robison, 1989; Babcock, 1990a; Robison & Babcock, 1990). Polymeroids of Baltic aspect have been previously described from autochthonous or parautochthonous rocks of Laurentia (Howell, 1937; Hutchinson, 1952; Shaw, 1966; Rasetti, 1967; Palmer & Stewart, 1968; Babcock, 1990a), new specimens from North Greenland are the first from relatively undisturbed stratigraphic sequences. Polymeroids described here (Table 1) and associated agnostoids described by Robison (1994) are preserved in shelf lithofacies that represent native terranes (as defined by Keppie, 1989) of the Laurentian palaeocontinent. This new material significantly increases the record of Cambrian trilobites from the Innuitian margin of Laurentia. Differences between Middle Cambrian polymeroid assemblages of Laurentian and Baltic aspect are inferred to have been controlled by, or covaried with, water temperature and are not necessarily due to endernism developed around distantlY separated cratons (Babcock, 1994)
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