Histórias da Geologia

Este blog pretende ser um espaço de reflexão sobre a evolução do conhecimento geológico ao longo dos tempos, principalmente a partir do século XVII, não esquecendo porém as pequenas histórias que fazem a grande história

sábado, agosto 05, 2006

Nery Delgado e as cruzianas


Em Portugal, Nery Delgado (1835-1908), um geólogo com papel de destaque na História da Geologia portuguesa, dedicou especial atenção ao estudo dos terrenos pré-câmbricos e paleozóicos, tentando identificar a que designou por fauna primordial do Câmbrico do Alto Alentejo. Interessou-se em particular pelo estudo das cruzianas (ver a referência ao Geoparque), assunto que o levou a uma larga troca de correspondência com geólogos e paleontólogos de outros países, tendo Nery Delgado assumido algumas posições polémicas sobre a sua origem: 'plusieurs caractères (...) nous confirment encore plus dans l'idée que ces fossiles on été des organismes, qui fort probablement ont appartenu au règene végétal'.

O desenho que reproduzimos foi realizado a partir de uma das amostras de cruzianas estudadas por Nery Delgado, a qual é pertença do Museu Geológico, em Lisboa.

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