Person geologist
Gagel
geologist
German geologist, author of Studien über den Aufbau und die Gesteine Madeiras, who named the rock madeirite, found essexite and madeirite at Porto da Cruz and saw Paul da Serra as a lava bank. Using Adolfo César de Noronha's collections, he judged the Selvagens mainly phonolitic.
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- Geology — German geologist, author of Studien über den Aufbau und die Gesteine Madeiras, who named the rock madeirite and saw Paul da Serra as a lava bank.
- Noronha (Adolfo César de) — Geologist who used Noronha's observations on Porto Santo and Selvagem Grande.
- Savage Islands — Geologist who studied Noronha's collections and judged the Selvagens mainly phonolitic.
- Hypersthenite — Geologist who found essexite and madeirite at Porto da Cruz, probably corresponding to Johnson's hypersthenite.
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