Search

The Conodonts Cordylodus proavus MULLER, K.J., 1959 et Acodus aff. A. deltatus LINDSTROM, M., 1955 are found, respectively, in the lower and the upper parts of the Santa Rosita Formation, the Tremadocian age of which is known from trilobites and dendroid graptolites. Of the acritarchs, Cymatiogalea cuvillieri (DEUNFF, J.) DEUNFF, J., GORKA, H. and RAUSCHER, R., 1974 occurs in the San Jose Shales, as well as in the Caldera Sandstones which contain also Acanthodiacrodium angustum (DOWNIE, C.) COMBAZ, A, 1967. Two conodonts, Bergstroemognathus extensus (GRAVES, R. W. and ELLISON, S., 1941) and Scandodus americanus SERPAGLI, E, 1974, s.f. from the lower part of the San Juan Limestones suggest an Arenigian rather than a Llanvirnian age, as indicated by trilobite evidence. The acritarch Domasia limaciformis (STOCKMANS, F. and WILLIERE, Y.) CRAMER, F.H., 1970, of late Llandoverian to early Wenlockian age in western Europe, is found in the Red Sandstones, in the lower part of the Lipeon Formation.

Outcrops of the Tremadocian of the Montagne Noire (Hérault, France) have yielded acritarch assemblages, in the Monts de Cabrières, composed of fifty-six species and one subspecies; eleven of thèse species, Micrhy2 stridium cleae, Vulcanispbaera gorgo, V. ? mougnoanum, Priscogalea ? glabra, P. gautieri, P. prisma, Cymatiogalea bouvardi, Acanthodiacrodium acbrasi, A. rupeum, A. scytotomillei and Dictyotidium bonneti and the subspecies Priscogalea cuvillieri fucata are new. The subspecies and fifteen of the species also occur at Col de Sainte- Colombe, in the Monts de Pardailhan. Two genera, Priscogalea DEUNFF, J., 1961 and Goniosphaeridium EISE¬ NACK, A., 1969 emend. KJELLSTRÖM, G., 1971, and one species, Cymatiogalea stelligera GORKA, H., 1967 are redescribed. The analysis of the Acritarchs indicates that the tectonic slices of black shales at Roquemaillère, in the Monts de Cabrières, are not necessarily of Silurian age, as previously thought, but may include deposits of Arenigian or Llanvirnian age.