Dans un mémoire, qui a été publié dernièrement dans les Annales géologiques du Service des Mines de Madagascar (1), j'ai décrit une faune albienne remarquable, caractérisée par l'abondance des Ammonites des Genres Douvillei-ceras, Lemuroceras et Brancoceras, et j'ai donné une coupe, selon Henri Besairie, du gisement principal de ces fossiles, situé dans la région d'Ambarimaninga, cercle de Sitampiky (Madagascar).

Au sommet de la coupe, c'est-à-dire au-dessus des couches principales à Ammonites que j'ai rapportées au sommet de l'Albien inférieur (Dou-villeicératien) et à la base de l'Albien moyen (partie inférieure de l'Oxytropidocératien) suivant l'échelle stratigraphique établie par Maurice Breistroffer (2), existe un banc fossilifère à Echinides épais de 1 m, où Henri Besairie a recueilli de très nombreux Oursins qui font l'objet du présent mémoire.

These bibliographies and the notes that accompany them have been prepared to aid the economic geologist in his study of ore deposits; they certainly will not do all of his work for him. I have tried to include all ore districts in northern Europe for which sufficient material is available in print to permit a student of ore deposits to obtain a real understanding of each of the northern European deposits in this Volume. Of the deposits selected from the impressive number available from the Soviet Union, only a small sample could be chosen. Those selected are ones for which the literature is sufficient to permit study in some detail by the student but only if he reads Russian with ease <...>

The fragile Antarctic environment consists of a closely linked system of the lithosphere, atmosphere, cryosphere, hydrosphere and biosphere. Changes in this system have influenced global climate, oceanography and sea level for most of Cenozoic time. The geological history of this region therefore provides a special record of important interactions between the various components of the Earth System.

Apatites from the major types of mainly magmatic-hydrothermal mineral deposits (30 localities, mostly in British Columbia, Canada) together with apatites from carbonatites (29 intrusive complexes) and unmineralized rocks (11 localities) have been analyzed by electron microprobe and laser ablation-inductively coupled plasma mass spectrometry. Discriminant analysis using Mg, V, Mn, Sr, Y, La, Ce, Eu, Dy, Yb, Pb, Th, and U reveals that apatites from mineral deposits can be distinguished from apatites in carbonatites and unmineralized rocks. Apatites from mineral deposits are characterized by higher Ca and correspondingly lower total contents of trace elements that partition onto the Ca sites (rare earth elements (REEs), Y, Mn, Sr, Pb, Th, and U) than apatites from unmineralized rocks and carbonatites.