Graptolites of the Early Ludlow Perham Formation, Presque Isle, Maine (Silurian of the United States)

Where: Maine (46.7° N, 68.0° W: paleocoordinates 28.1° S, 32.8° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: upper Member (Perham Formation), Ludlow (427.4 - 423.0 Ma)

• member-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; calcareous sandstone and calcareous siltstone

• SEP environmental call based on given information and other information in Boucot in Boucot and Lawson (1999).

•Could also be offshore.

• "The graptolite bearing strata are tan-weathering, dark gray, thinkly laminated, fine grained sandstones and siltstones, some of which have calcareous interbeds."

Collection methods: Seven localities within the same small area have been combined.

Primary reference: W. B. N. Berry. 1964. Early Ludlow graptolites from the Presque Isle Quadrangle, Maine. Journal of Paleontology 38(3):587-599 [M. Foote/M. Foote/M. Foote]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 24793: authorized by Michael Foote, entered by Michael Foote on 20.08.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Pterobranchia
 Graptoloidea - Monograptidae
"Monograptus bohemicus" = Bohemograptus bohemicus, Monograptus chimaera, Monograptus colonus, Monograptus crinitus, Monograptus dubius, Monograptus forbesi, Monograptus nilssoni, Monograptus scanicus, Monograptus tumescens, Monograptus varians, Monograptus cf. vicinus, Monograptus sp.
"Monograptus bohemicus" = Bohemograptus bohemicus Barrande 1850 graptolite
Monograptus colonus graptolite
var. compactus
Monograptus dubius graptolite
Monograptus tumescens graptolite
var. contus
Monograptus sp. graptolite
sp. A