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Questions and Answers
What is the minimum iron composition required for iron-rich sedimentary rocks?
What is the minimum iron composition required for iron-rich sedimentary rocks?
- 10 wt.%
- 5 wt.%
- 20 wt.%
- 15 wt.% (correct)
What distinguishes iron formations from ironstones?
What distinguishes iron formations from ironstones?
- Color and texture
- Age and iron composition (correct)
- Presence of specific iron minerals
- Geological location
Which type of iron-rich sedimentary rock is mainly Precambrian in age?
Which type of iron-rich sedimentary rock is mainly Precambrian in age?
- Siderite rocks
- Goethite rocks
- Ironstones
- Iron formations (correct)
What minerals are found in ironstones?
What minerals are found in ironstones?
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What distinguishes native or telluric iron from ironstone?
What distinguishes native or telluric iron from ironstone?
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