Mine management services, namely, managing the exploration, production and operations of mines for others

'explor':7 'manag':2,5 'mine':1,12 'name':4 'oper':10 'other':14 'product':8 'servic':3

Exploration of raw materials, namely, iron, ore, coal and natural gas

'coal':8 'explor':1 'gas':11 'iron':6 'materi':4 'name':5 'natur':10 'ore':7 'raw':3

Mining extraction of raw materials, namely, iron, ore, coal and natural gas

'coal':9 'extract':2 'gas':12 'iron':7 'materi':5 'mine':1 'name':6 'natur':11 'ore':8 'raw':4

Refining and processing of raw materials, namely, iron, ore, coal and natural gas

'coal':10 'gas':13 'iron':8 'materi':6 'name':7 'natur':12 'ore':9 'process':3 'raw':5 'refin':1

CLIFFS NATURAL RESOURCES

Owners