000			00219nam a2200097 4500
100			_aGSA,
245			_aBullettin of Geol. Soc. America,,vol.94(7-12) _cGSA,
260			_aGSA, _c1983
260			_aGSA, _c1983
942			_cCR
999			_c336943 _d336943