to Block Oxy ÐÊ -ÐÊ*  
The Justice Department yesterday filed a civil antitrust suit against Occidental Petroleum Corp., in an effort to block the $1 billion takeover of the Mead Corp.</br></br>The government claims that if Occidental is allowed to take over Mead, the company could monopolize the markets for several products.</br></br>ÛÏThe two companies are multi-bil-lion-dollar diversified companies with overlapping interests in sodium chlorate, coal and carbonless copy paper,Û the Justice Department said in announcing the suit</br></br>West Virginfe entered the railroad business yesterday, formally taking deed to a 52-mile stretch of track that has been unprofitable for the Chessie System.</br></br>In an unusual procedure that may set a precedent for maintaining railroad service along routes with a relatively small amount of freight shipments, Chessie donated the branch line and associated real estate to the state.