Geology: Land
Plate Tectonics - Separated land from water. Mountains are formed through subduction.
Achronite
Acmite (P)
Actioline (A)
Adularia (O)
Agate
Alabandite
Alabaster
Albite (F)
Alexandrite
Allanite
Allemontite
Allophane C
Alamandine (G)
Altaite
Alunite
Amazonstone
Armblygonite
Amethyst
Amphibole
Analcime
Anatase
Anauxite
Andalusite
Andesine (P)
Andradite (G)
Anglesite
Anhydrite
Ankerite (Cb)
Annebergite
Anorthite (P)
Anorthcolase (O)
Anthophylite (A)
Antigorite
Antimony
Antierite
Apatite
Apophylite
Aquamarine
Aragonite
Arfvedsonite (A)
Argenitite
Arsenic
Arsenopyrite
Atacamite
Augite
Aurichalcite
Autunite
Awaruite
Axinite
Geology / Ecology
Ecosystems
• Habitats
• Rain forest
• River/ Lakes/ Ocean
• Meadow
• Mountains
Soil Composition
• Organic Soil
• Compost
Green Technology
Ecosystems
Healthy Oceans (Water)