Assertion: siderite | /r/AtLocation | limited amounts
Facets:
value: in restricted environments
type: LOCATION
Source sentences:
text: Though ancient limestones and dolomites are composed of calcite and dolomite, respectively, other calcite group minerals such as magnesite (MgCO 3 ), rhodochrosite (MnCO 3 ), and siderite (FeCO 3 ) occur in limited amounts in restricted environments .