Is line hard rock or soft rock - AnswersGenerally speaking, when a geologist talks of "soft rocks" and "hard rocks" what he or she means is "sedimentary rocks" or "igneous and metamorphic rocks".is line a hard rock,Line: Characteristics, Uses And Problems - GSAJul 13, 2016 . Line is a sedimentary rock composed principally of calcium .. by deterioration and repointing, especially due to the use of too hard a.Dolomite: A sedimentary rock known as dolostone or dolomite rockDolomite and line are similar rocks. Both are sedimentary carbonates with many near-identical properties.
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