Fortification Road/road cut (Eocene of New Zealand)

Where: North Otago, New Zealand (45.2° S, 170.9° E: paleocoordinates 52.4° S, 169.7° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Priabonian (38.0 - 33.9 Ma)

Environment/lithology: transition zone or lower shoreface; tuffaceous, red, calcareous conglomerate and massive, white limestone

• it seems likely that individual pebbles were overturned, probably in storm events, about once or twice in a year.

•The mean-water depth of the Alma/Fortification Road rockground is estimated to be around 25 m.

•moderately current-swept channel adjacent to small volcanic islands and seamounts

• The section is dominated by numerous small rhodoliths. Higher in the section, basalt pebbles are abundant and the pebbly tuff beds are overlain by 1.2 m of massive, white limestone that grades up into highly bioturbated, unfossiliferous gray-brown tuffs. Reddish basalt pebbles in the upper part of the section here are considered most likely to have been derived from subaerial lava flows, although most basalt clasts are probably of submarine origin.

•"mobile rockground" of encrusted pebbles and cobbles in calcareous, tuffaceous volcanic conglomerate horizons.

Size classes: macrofossils, mesofossils

Collection methods: chemical, sieve,

• Preparation: both encrusted clasts and iso1ated bryozoan fragments were soaked overnight in undiluted domestic bleach (NaOCl solution), following controlled sonication (usually several seconds), samples were thoroughly washed by gentle tumbling in clean water, then dried.

•Samples selected for study of agglutinated sediment particles were gently washed without bleaching or sonication.

Primary reference: D. E. Lee, J. Scholz, and D. P. Gordon. 1997. Paleoecology of a Late Eocene Mobile Rockground Biota from North Otago, New Zealand. Palaios 12(6):568-581 [L. Liow/F. Franeck]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 172816: authorized by Lee Hsiang Liow, entered by Franziska Franeck on 26.08.2015

Creative Commons license: CC BY (attribution)

Taxonomic list

• non-bryozoan taxa not entered
Gymnolaemata
 Cheilostomata - Umbonulidae
 Cheilostomata - Cribrilinidae
Cribrilinidae indet. Hincks 1880
gen. et sp. nov.
? Figularia sp. Jullien 1886
 Cheilostomata - Aspidostomatidae
 Cheilostomata - Microporidae
Micropora sp. Gray 1848
 Cheilostomata - Romancheinidae
 Cheilostomata - Chaperiidae
 Cheilostomata - Calloporidae
 Cheilostomata - Buffonellodidae
cf. Buffonellodes sp.
? cf. Buffonellodes sp.
 Cheilostomata - Cellariidae
Cellaria "sp. 1" Ellis and Solander 1786
 Cheilostomata - Lacernidae
 Cheilostomata - Porinidae
 Cheilostomata - Gigantoporidae
 Cheilostomata - Schizoporellidae
 Cheilostomata - Smittinidae
 Cheilostomata - Phylactellidae
Nimba sp. Jullien 1903
 Cheilostomata - Celleporidae
 Cheilostomata - Phidoloporidae
Phidoloporidae indet. Gabb and Horn 1862
 Cheilostomata - Escharinidae
Stenolaemata
 Cyclostomatida - Annectocymidae
 Cyclostomata - Lichenoporidae
 Cyclostomata - Cinctiporidae
? Cinctiporidae indet. Boardman et al. 1992
 Cyclostomata - Frondiporidae
Filifascigera sp. d'Orbigny 1853
misspelled in the publication as Filifasgera, pers. comm. D. Gordon 08/2015
 Cyclostomata - Diaperoeciidae
 Cyclostomata - Tubuliporidae
Platonea sp. Canu and Bassler 1920
 Cyclostomata - Plagioeciidae
Plagioecia sp. Canu 1918
 Cyclostomata - Horneridae
Hornera sp. Lamouroux 1821