26 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I48 



ARGENTINA 



Only two hexahedrites, the Otumpa and the Tandil, are recorded 

 from Argentina. A field investigation recently was made in the area 

 of the Otumpa meteorite (Campo del Cielo) by the Lamont Geo- 

 logical Observatory under the leadership of Dr. William A. Cassidy. 

 Dr. Daniel J. Milton of the U. S. Geological Survey, associated with 

 Dr. Cassidy in the meteorite studies in Argentina, reports the follow- 

 ing: Seven impact craters have been identified distributed along a 

 single line about 18 km. long trending N. 60° E.,S. 60° W. Careful 

 search in one area near the middle of this line indicates that a zone of 

 abundant meteorites (many thousands per square kilometer) have the 

 same ENE-WSW orientation and a width of about 3 kilometers, . . . 

 In addition, a hexahedrite of 7 kg. has been found 65 kilometers N. 

 60° E. of the northeasternmost crater. The intervening distance has 

 not yet been investigated. Locating this on a map, the middle of the 

 crater line is about 27°35' S. and 61°40' W. with the westernmost 

 crater in the Province of Santiago del Estero. The isolated iron comes 

 from approximately 27°23' S., 61° 5' W." 



The Tandil iron is reported as a witnessed fall, although the details 

 about this fall and its discovery are not satisfactorily documented. 

 If this iron was seen to fall, its geographic relationship with the 

 Otumpa specimens is accidental, 



AUSTRALIA 



Four of the five Australian hexahedrites listed in table 11 and 

 plotted on the map in figure 6 show a narrow geographic grouping. 

 These irons were found along a north and south line about 35 miles 

 long — the direction in which the Tombigbee River (Alabama) and 

 Chilean irons were aligned. However, in Chile, it would be impossible 

 to align that many meteorites in any direction other than north and 

 south. 



Table 11. — Data on Australian hexahedrites. 



Weight, 

 Meteorite Date found kilograms Coordinates 



Bingara 1 1 1880 (240.7 gms.) 29°53' S. 150°34' E. 



Bingara 2 1924 6.4 9 miles north of No. 1 



Bingara 3 (Barraba) unknown 1.34 30°25' S. 150°37' E. 



Bingara 4 (Warialda) 1919 2.5 29°34' S. 150°3S' E. 



Yarroweyah 1903 9.5 35°59' S. 145°35' E. 



1 The spelling of Bingara varies, in some places appearing as Bingera. 



