1. The crystals occur in the disequilibrium assemblage calcite – phengite (2M1) – margarite – quartz – kaolinite – epidote –apatite found in Badshot marble from the almandine garnet zone of regional metamorphism.

L'analyse, à la microsonde électronique, de cristaux de margarite montre une zonation depuis le centre Ca1.13Na0.74K0.05(Al4.01Ti0.02Fe0.13Mg0.05)[Si4.78Al3.12O20](OH)4 à la périphérie Ca1.63Na0.26 K2.005(Al3.98Ti0.02Fe0.13Mg0.05)[Si4.10Al3.90O20](OH)4. Les cristaux se trouvent dans un assemblage en déséquilibre, calcite – phengite (2M1) – margarite – quartz – kaolinite – epidote – apatite, provenant du cipolin de Badshot, qui a subi un metamorphisme régional dans la zone à almandin.

2. metamorphites, Mesozoic igneous intrusive rocks, Tertiary volcanic and sedimentary breccias, and Quaternary alluvia. The Precambrian Halloran Complex has been subdivided into the following formations: (1) Silver Lake Peak Formation, mostly quartzofeldspathic gneisses; (2) Cree Camp Formation, quartzites and metarhyolites; (3) Riggs Formation, metamorphosed carbonate rocks. This complex is intruded by dioritic rocks. Regional metamorphism produced parageneses of the almandine amphibolite facies. Metablastesis was a major phenomenon, partial fusion was a local one. The rocks are, therefore, metatexites. Regional metamorphism was followed by diaphthoresis, accentuated in a zone of dislocation.

Les « Halloran Hills » sont composés de roches métamorphiques précambriennes, re roches ignées intrusives mésozoiques, de brèches volcaniques et sédimentaires tertiaires ainsi que de galets quaternaires.

3. Two grades of metamorphism, both subfacies of the greenschist facies of regional metamorphism, were mapped on the Araya Peninsula: 1. the quartzalbite-epidote-almandine subfacies, consisting mainly of a sequence of garnet and kyanite quartz-mica schists, interlayered with quartzites; and 2. the quartzalbite-muscovite-chlorite subfacies, which consists of chloritic phyllites, quartzmica schists and phyllites, metaconglomerates, calcareous quartz-mica schists, limestones and marbles, and calcareous epidote schists of volcanic origin.

Tous deux sont des sous-faciès du faciès des schistes verts du métamorphisme régional: 1. le sous-faciès de quartz-albite-epidote-almandine, constitué de schistes de quartz micacé granatifère et cyanitique, interstratifié de quartzites; 2. le sous-faciès de quartz-albite-muscovite-chlorite, constitué de phyllites chloritiques, schistes et phyllites quartzo-micacées, metaconglomérats, schistes quartzo-micacées calcaires, calcaires et marbres, et schistes épidotiques calcaires d'origine volcanique.