Re: [請益] 黃金閱讀The Geologic History of the …
※ 引述《miraculouss (也無風雨也無晴)》之銘言：
: the gypsum was found to possess peculiarities of composition and structure
: that suggested it had formed on desert flats. Sediment above and below the
: gypsum layer contained tiny marine fossils, indicating open-ocean conditions.
From above passage, you could get two points:
1. gypsum had formed on desert flats
2. gypsum layer located between sediments which contained tiny marine fossiles
So you can infer from these two points that there is no marine fossiles in
gypsum layer.
: 4．Which of the following can be inferred from paragraph 3 about the solid
: gypsum layer?
: ○It did not contain any marine fossil.
: ○It had formed in open-ocean conditions.
: ○It had once been soft, deep-sea mud.
: ○It contained sediment from nearby deserts.
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