Dr. Nagy I. Zoltán szerk.: Fragmenta Mineralogica Et Palaentologica 2. 1970-71. (Budapest, 1971)

new forms appear.On the basis of the following forms this formation can be assigned to a higher level, the Globigerina tapuriensis Zone (P18): Globigerina tapuriensis Blow and Banner, Globigerina anguliofficinalis Blow, and Globigerina liverovskae (Bykova). The Globigerina tapuriensis Zone is considered by Blow (1969) and Berggren (1969) as of Early Oligocène age. However, Blow, who established this zone, reveals some incertainty. Concerning the Eocene/Oligocene and the P17/P18 boundaries, he notes that "the actual positions of these two boundaries may prove not to be coincident". According to evidence obtained from the Hungarian profiles, the Globigerina tapuriensis Zone can be subdivided into an Upper Eocene and a Lower Oligocène part. The Cylindroclavulina cylindrica Zone is characterized by the abundance of the following planktonic speciesj Globigerina tripartita Koch, G. tapuriensis Blow and Banner, G. pseudovenezuelana Blow and Banner, G. jacksonensis Bandy, Globorotalia /T./ increbescens (Bandy). The benthonic fauna reveals some facie s— bound differentiation. Beds very rich in Bathysiphon and Rhabdammina have been deposited very near to the shoreline. This facie s has been recognized by the author at a few localities only, such asî Sashegy Hill (where it is directly overlying a transgressive conglomerate group), Kisgellérthegy Hill and Ezüsthegy Hill. Somewhat deeper (50 to 80 m) origin is assumed for the Litho— thamnium bearing limestone interbeds which contain UummuliteB budensis Hantken and N.incrassatus de la Harpe (courtesy of Dr. T. Kecskeméti) as well as Operculines. A similar interfingering of Lithothamnium bearing limestones with planktonlferous marls was observed by L. Majzon in the Bükk Mountains foreland (boreholes Recsk IV" and Bükkszék 7).