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Question

Difficulty: EasyExplicit Detail Retrieval

Passage:
In 1821, Swiss engineer Ignaz Venetz presented a paper asserting that polished and striated bedrock found throughout the Val de Bagnes was produced by the movement of expanded glaciers rather than catastrophic deluge. Venetz based his conclusions on field observations of erratic boulders—massive rocks deposited far from their geological origins—which exhibited identical abrasion patterns to those carved by active Alpine ice sheets. Although initial reception by the Swiss Natural Sciences Society was skeptical, Venetz expanded his hypothesis in 1829, proposing that an extensive ice sheet had once covered much of northern Europe. His empirical documentation of morainic ridges directly influenced geologist Jean de Charpentier, who subsequently convinced Louis Agassiz to formulate the comprehensive theory of continental glaciation.

Based on the passage, which of the following statements regarding Ignaz Venetz's research are explicitly supported? Select all that apply.

  1. A
    Ignaz Venetz attributed the abrasion patterns found on bedrock primarily to catastrophic deluges.
  2. Ignaz Venetz's empirical documentation of morainic ridges informed the work of Jean de Charpentier.Answer
  3. Field observations cited by Ignaz Venetz involved rocks situated at a distance from their geological places of origin.Answer

Answer

The statements confirming that Venetz's documentation of morainic ridges informed Jean de Charpentier and that his observations involved rocks situated at a distance from their places of origin are explicitly supported by the passage.
The passage explicitly supports two claims: first, that Venetz's empirical documentation of morainic ridges directly influenced geologist Jean de Charpentier; second, that erratic boulders are defined as massive rocks deposited far from their geological origins.

Step-by-Step Solution

1
Locate explicit mentions of Ignaz Venetz's findings and influence in the text.
Identified two explicit facts: Venetz documented erratic boulders (rocks far from their geological origins) and his documentation of morainic ridges influenced Jean de Charpentier.
Explicit detail retrieval requires matching passage details directly with option statements without extrapolation.
2
Evaluate the statement regarding catastrophic deluges.
The text states bedrock striations were caused by glaciers 'rather than catastrophic deluge', contradicting the statement.
Misreading negated phrases or contrast markers leads to incorrect fact retrieval.

Key Concept

Explicit Detail Retrieval
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Explicit Detail Retrieval

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