Types of Phosphorite Deposits

Peloids and coids

Pebbles and limestone fragments

Vertebrate skeletal fragments (correct)

Phosphatic grains and pellets

Composed of phosphatic nodules

Spherical to irregular-shaped nodules

Mechanically concentrated by reworking of earlier-formed phosphate deposits

Homogeneous (structureless) to layered or concentrically banded (correct)

Carbonaceous mudrocks, cherts, and carbonate rocks

Excrement of birds and possibly bats that has been leached to form an insoluble residue of calcium phosphate (correct)

Phosphatized fossils and skeletal fragments

Peloids, coids, pisoids

<p>Phosphatic nodules, phosphatized limestone fragments, or phosphatic fossils</p> Signup and view all the answers

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