A

▪ accretion (veins) ▪ accretion (tectonic) ▪ accretionary prism ▪ allochthonous nappe ▪ angular unconformity ▪ anatexis ▪ anticline ▪ aphanitic texture ▪ aplite, aplite dike (◙ aplite) ▪ argillaceous, argillic ▪ assimilation ▪ assymetric fold ▪ assymetric vein ▪ attitude of structures ▪ autochthonous ▪ axial plane ▪ axis (fold) ▪ azimuth ▪

Ancient continents ▫ Baltica