Twelve taxa of calcareous nannofossils and twenty-one of benthic foraminifera have been identified from calcareous marine siltstones near Bogenfels, South West Africa. These taxa establish the sediments as upper Eocene. It is equally correct to assign them either to Martini's NP 19-NP 20 nannofossil zones (37,2 - 39,5 m.y.B.P.) or to Bukry's Isthmolithus recurvus subzone (38-41 m.y.B.P.). The sediments were deposited in a shallow, near-shore environment; the overlying watermass was cool-temperate and had normal marine salinity. The informal name 'Langental beds' is suggested for the low-lying, fossiliferous rocks in the area, at least some of which are upper Eocene. The informal name 'Buntfeldschuh beds' is suggested for the topographically higher, essentially unfossiliferous units. The Buntfeldschuh beds may be upper Paleocene - lower Eocene.