...Fig. 4. Upper: thin interbeds of shale, sandstone and impure limestone belonging to the Mississippian Ballagan Formation, Edington Mill [NT 8934 5479]. These strata, for many years known as the Cementstones, were separated from the overlying Mountain Limestone as the Tuedian by Tate (1857 a , p...

.... Thesis, M.Sc, Univ. of Durham. Bell, F. G. 1974. The Tuedian Sandstones of North Northumberland. Thesis, Ph.D., Univ. of Sheffield. Day, J. B. W., Land, O. H., Price, R. H., Mills, D. A. C. and others 1970 . Geology of the Country around Bew-castle. Mem. geol. Surv...

... boundstones, and the genesis of the upper Capitan Limestone (Permian, Guadalupian), Guadalupe Mountains, West Texas and New Mexico Upper Guadalupian facies, Permian reef complex. Guadalupe Mountains, New Mexico and West Texas 1977 77–16 SEPM Permian Basin Section Publication 3 44 Babcock J...

... in this study and horizons and facies occurrences of calcified cyanobacteria and associated microfossils. Figure 3. Sedimentary facies types of strata from outcrops and wells involved. ( 1–4 ) Reef facies; ( 1 ) reef limestone containing the coral Lichenaria and calcified cyanobacteria Proaulopora...

...QI FENG; YI-MING GONG; ROBERT RIDING Abstract Givetian, Frasnian and Famennian limestones from southern China contain microfossils generally regarded as calcified algae and cyanobacteria. These are present in 61 out of 253 sampled horizons in four sections from three widely spaced localities...