Primitive life left its mark on Earth by transforming rocks, creating patterns and minerals

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Tiento

Member
Vietnamese
  • entangledbank

    Senior Member
    English - South-East England
    It's a coordination of two gerund-participial clauses. It's equivalent to:

    Primitive life left its mark on Earth by transforming rocks,
    and by creating patterns and minerals only formed in the presence of life.

    In fact the implicit connexion is a bit stronger than 'and': it's not just doing two things; rather, the 'creating' clause is an explanation of how it transformed rocks.

    The sentence is misleading because it looks like a coordination of three things:

    by (a) transforming rocks, (b) creating patterns, and (c) minerals only formed . . .

    and (c) doesn't make enough sense.
     

    Smithy73

    Senior Member
    UK
    English - England
    I know that this will be deleted as it is irrelevant to the question but if you can read this in time: try to not watch Fox.
     
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