See footnotes at end of table. 1142 MINERALS YEARBOOK, 1978-79 
 
Table 17.-.-Trinidad and Tobago: Exports and reexports of mineral commodities

—Continued 
(Metric tons unless otherwise specified) 
 Commodity 1977 1978 
 
NONMETALS —Continued 
 
Stone, sand and gravel: 
Dimension stone: 
     Crude  2 70 
     Worked  14 1 
  Gravel and crushed stone  11 1 
  Quartz  -- 2 
  Sand  121 17 
Sulfuricacid, includingoleum   99 
Talc  8 4 
Other: Building materials of asphalt, asbestos, and fiber cement, and 
 unfired nonmetals, n.e.s  1 7 
        MINERAL FUELS AND RELATED MATERIALS 
Asphaltandbitumen, natural  170,731 1,589 
Coal: 
  Bituminous  1 -- 
  Lignite  10 1 
  Hydrogen,helium,raregases  15 3 
  Petroleum: 
  Crude and partly refined thousand 42-gallon barrel&. - 58,700 58,969

 
 
Refinery products: 
 Gasoline do 8,494 8,806 
 Kerosineandjetfuel do_..~ 7,852 5,647 
 Distillate fuel oil do__._ 9,648 9,030 
 Residual fuel oil do — — — 54,045 46,790 
 Lubricants do~ 716 526 
Other: 
 Mineral jelly and wax do. — - - 1 1 
 Liquefiedpetroleumgas do~_ 169 262 
 Nonlubricatingoils, n.e.s do... 196 140 
 Bitumenandotherresidues do~. 45 10 
 Bituminousmixtures,n.e.s do_~ 5 6 
Total do._ 81,171 71,218 
TRevised. 
1L~ than 1/2 unit. 
2Partial figures; exclude quantities valued at $3,218 in 1977 and $4,990
in 1978. 
Table 18.—Trinidad and Tobago: Imports of mineral commodities 
(Metric tons unless otherwise specified) 
Commodity 1977 1978 
METALS 
Aluminum: 
  Alumina 104 308 
  Metal including alloys, all forms 2,745 2,992 
Arsenic trioxide, pentoxide, acid 2 - - 
Copper: 
  Copper sulfate 117 40 
  Metal including alloys, all forms T2151 687 
Iron and steel: 
  Ore and concentrate 3 - - 
  Pig iron, ferroalloys, similar materials 53 5,281 
  Steel, primary forms 4,696 10,619 
 
Semimanufactures: 
 Bars, rods, angles, shapes, sections 102,877 244,239 
 Universals, plates, sheets 407,878 601,569 
 Hoopandstrip 260 358 
 Rails and accessories 367 6 
 Wire 70,386 7,318 
 Tubes, pipes, fittings 288,224 397,450 
 Castingsand forgings, rough  14 
 Total rg70~)() 1,250,954