Spithami, Kahula Fm. (Ordovician of Estonia)

Also known as Locality H6; Spithamn; Cape Põõsaspea; Poosaspea, Spitham

Where: Lääne, Estonia (59.2° N, 23.5° E: paleocoordinates 31.4° S, 1.9° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Kahula Formation, Johvi (453.0 - 449.9 Ma)

• No stratigraphic data of higher resolution than "Haljala Regional Stage" are given in the primary reference. Hints et al. (2008, Estonian J. Earth Sci. 57(3)), in a short note, report an exposure of the Kinnekulle K-Bentonite from this locality. Thus, the rocks clearly are of Jõhvian age and belong, without much doubt, to the Kahula Formation (cf. Kaljo et al, 2007, Palaegeogr. Palaeoclimat. Palaeoecol. 245, p. 138-155, fig. 2).

Environment/lithology: open shallow subtidal; lithified, argillaceous limestone

• "North Estonian Confacies Belt at the northern flank of the Livonian Tongue" (Kröger & Isakar, 2006)

•"Rhythmically bedded argillaceous wackestones–packstones of the Haljala Stage have been deposited in the temperate climate open marine conditions on the upper shelf or ramp (Nestor & Einasto 1997). The abundance and high diversity of benthic shelly fauna refers to the depositional environment at a moderate depth, probably within the photic zone." Ainsaar & Meidla (2004, Abstracts and Field Guide volume of WOGOGOB-2004 8th Meeting on the Working Group on the Ordovician Geology of Baltoscandia [http://www.gi.ee/WOGOGOB/wogogob_web.pdf])

• informations on lithology are from Raukas & Teedumäe (eds, 1997, Geology and Mineral Resources of Estonia, html version, http://sarv.gi.ee/geology)

Size classes: macrofossils, mesofossils

Preservation: cast

Primary reference: B. Kröger and M. Isakar. 2006. Revision of annulated orthoceridan cephalopods of the Baltoscandic Ordovician. Fossil Record 9(1):137-163 [B. Kröger/B. Kröger/B. Kröger]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 87270: authorized by Björn Kröger, entered by Torsten Liebrecht on 13.03.2009, edited by Björn Kröger

Creative Commons license: CC BY (attribution)

Taxonomic list

 Glyptosphaeritida - Protocrinitidae
Protocrinites oviformis2 Eichwald 1840
Trilobita
 Phacopida - Pterygometopidae
Toxochasmops (Schmidtops) proavus3 Roomusoks 1998 trilobite
Cephalopoda
 Orthocerida - Orthoceratidae
Rhynchonellata
 Orthida - Platystrophiidae
Platystrophia chama1 Eichwald 1861
 Orthida - Angusticardiniidae
Apatorthis tenuicostata1 d'Eichwald 1840
Strophomenata
 Strophomenida - Rafinesquinidae
Kurnamena taxilla4 Oraspold 1965
Astamena inaequalis4 Roomusoks 1989
 Strophomenida - Strophomenidae
Septomena alliku4 Oraspold 1956