Discuss the mode of occurrence of chromium ores. 

Chromium is a metallic element that is widely used in various industries, including metallurgical, chemical, and refractory industries. The primary source of chromium is chromite, which is a mineral that is composed of chromium, iron, and oxygen. Chromite is the only ore mineral of chromium, and it occurs in several different modes of occurrence, including:

1. Podiform deposits: Podiform deposits are tabular or lens-shaped bodies of chromite that occur in association with ultramafic rocks. These deposits are typically hosted by serpentinite or peridotite, which are ultramafic rocks that have undergone metamorphism. Podiform deposits are ___ _______ ___ ________ _________ ____.
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