. Bulletin of the British Museum (Natural History). 128 G. F. ELLIOTT Balambo Formation (Dunnington, Wetzel & Morton 1959 : 50, 230), and Oswald's Turkish account seems compatible. The exact level of the type-material of Euspondyloporella in the Lower Cretaceous was given as probably Barremian-Aptian (Sokac & Nikler 1973:8). The Oswald sample, to which he assigned Hauterivian age, does not show orbitolines etc., and if therefore from a pre-orbitoline horizon, a Hauterivian-Barremian age seems likely. 2. Palaeocene-Lower Eocene Oswald (1906): 'Lithothamnion'; pp. 249, 418. Dark-grey lim
. Bulletin of the British Museum (Natural History). 128 G. F. ELLIOTT Balambo Formation (Dunnington, Wetzel & Morton 1959 : 50, 230), and Oswald's Turkish account seems compatible. The exact level of the type-material of Euspondyloporella in the Lower Cretaceous was given as probably Barremian-Aptian (Sokac & Nikler 1973:8). The Oswald sample, to which he assigned Hauterivian age, does not show orbitolines etc., and if therefore from a pre-orbitoline horizon, a Hauterivian-Barremian age seems likely. 2. Palaeocene-Lower Eocene Oswald (1906): 'Lithothamnion'; pp. 249, 418. Dark-grey limestone from Chorak Khan, 45 km NW of Bayburt. Turkish Geological Map I : 800,000, Sheet 3, Sivas (1946). 'Lilhothamnion' was for a long time used as a general term for a very wide variety of coralline algae. Recent and fossil. The examples in Oswald's rock are cylindrical units of the segmented coralline Amphiroa; probably a new species, but the rock and its fossil content are markedly affected by mineralization and diagenesis - Oswald refers to the rock as a marble (Oswald 1906 : 248, 418)-and most examples of the fossil are obscured by this. Associated are fragments of Archaeolithothamnium sp., 1 Pycnoporidium, 1 Elianella (Parachaeteles auctt.), and what from outline and traces of structure remaining is probably the feather-alga, Disiichoplax bisehalis (Dietrich) Pia. Molluscan and echinoid debris is also present. This is probably a Palaeocene-Lower Eocene assemblage; a better-preserved sample could confirm this. All of these genera and species occur in rocks of that age in northeastern Iraq, south of the Turkish frontier, and so Oswald's assigned age of Middle-Upper Eocene can be modified. His 'Lilhothamnion' is an Amphiroa sp. (Fig. 3) showing wide peripheral perithallus bordering the distinctive zones of the medullary hypothallus, and it is not the same as the Iraqi Palaeocene Amphiroa elliolti (Johnson 1964). The Turkish species is not formally described as new by reason
Size: 1950px × 1282px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorbritishmuseumnaturalhistory, bookcentury1900, bookcoll
