Ball's Falls, 6.4 m above base (Silurian of Canada)

Where: Ontario, Canada (43.1° N, 79.4° W: paleocoordinates 24.0° S, 48.3° W)

• small collection-level geographic resolution

When: Cabot Head Formation, Llandovery (443.4 - 433.4 Ma)

• 6.4 m above base of formation

• bed-level stratigraphic resolution

Environment/lithology: prodelta; poorly lithified, gray, green, calcareous siltstone and sandstone

• "Dark gray to green, fissile, calcareous to arenaceous shale and siltstone and interbedded light gray to green, fine- to med-grained calcareous sandstone....considered to be prodeltaic facies of the Cabot Head."

Collection methods: surface (in situ), mechanical,

Primary reference: J. D. Eckert. 1984. Early Llandovery crinoids and stelleroids from the Cataract Group (Lower Silurian) in southern Ontario, Canada. Royal Ontario Museum Life Sciences Contributions 137:1-63 [J. Alroy/M. Sommers/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 3493: authorized by John Alroy, entered by Mike Sommers on 03.08.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

• Crinoids only.
Show authors, comments, and common names
unclassified
  -
Cataractocrinus clementi
Cataractocrinus clementi
gen. et sp. nov.
Crinoidea
 Monobathrida - Patelliocrinidae
Kylixocrinus latus
Kylixocrinus latus Sea lily
gen. et sp. nov.
 Dendrocrinida - Dendrocrinidae
Dendrocrinus parvus
Dendrocrinus parvus Sea lily
sp. nov.
Asteroidea
 Euaxosida - Mesopalaeasteridae
Medinaster orbiculus
Medinaster orbiculus Eckert 1984 sea star
gen. et sp. nov.