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From Charles Lyell   7 May 1860

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Summary

Saw Salter’s Spirifer specimens; a very good proof of indefinite modifiability.

Beginning to think gap between Cambrian and Lower Silurian enormous.

Édouard Lartet to give paper before Geological Society ["On coexistence of man with certain extinct quadrupeds", Q. J. Geol. Soc. Lond. 16 (1859–60): 471–5].

Author:  Charles Lyell, 1st baronet
Addressee:  Charles Robert Darwin
Date:  7 May 1860
Classmark:  DAR 205.9: 396
Letter no:  DCP-LETT-2787

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  • letter to Charles Lyell, 4 May [1860] . Joachim Barrande believed that the lower Silurian formations around Prague constituted a new system, which he named the ‘Primordial’. Comparable rocks in Britain were the subject of heated debate between Adam Sedgwick
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