Mar., 1905. THE RODEO METEORITE—FARRINGTON. 5 
the large amount of schreibersite visible in the sections, such a con- 
tent of phosphorus would be expected. 
Including Rodeo, the meteorites now recognized from the State 
of Durango are, with dates of their fall or find, as follows: 
Bmore pMegiitic chondrite, COM. ccc eked «dn vee eee 1856 
Pre eae OCtanedmtenOt. vs... .0eesus fenreucc eel. 1888 
metamaetiamimond octahedrite, OW) ..2..02.-..05 elena os 1867 
Pemeomrvlediiin Octahbedrite, Om: ofs..he.. sede wes cea) eos 1852 
Raricho de la Pila, Medium octahedrite, Om................ 1804 
san Francisco del Mezquital, Siratik ataxite, Ds ............ 1868 
The localities of these have been determined as accurately as 
possible by the writer from various published accounts, and are 
represented as determined on the accompanying map (Plate IV.). 
Of these meteorites only one, Avilez, is a stone; the others are all 
irons. Of the irons, Cacaria and San Francisco del Mezquital are 
sufficiently distinguished by their structure, Cacaria being a Ham- 
mond octahedrite and San Francisco del Mezquital an ataxite. 
Rodeo and Rancho de la Pila are both medium octahedrites, but the 
localities from which they come are about seventy miles apart. 
Hence only Bella Roca needs to be compared with Rodeo in order to 
determine whether it belongs to the same fall. The localities of 
Rodeo and Santiago Papasquiaro, near which Bella Roca is said to 
have been found, are in a direct line about forty miles apart. This 
is much farther than parts of a single meteor could have been natu- 
rally distributed according to our present knowledge. That they 
might have been separated by human agency is possible, but not 
probable, since the country between these localities is thinly settled 
and difficult to travel over. From the appearance of the surface of 
the Bella Roca meteorite Brezina concluded* that it could have 
lain exposed but a little while. The Rodeo meteorite, however, 
is known as far back as 1852. Brezina also describes Bella Roca 
as a highly oriented individual showing an almost complete fusion 
crust. Neither of these observations would apply to the Rodeo 
iron. From the point of view of structure the two irons do not 
differ essentially. The appearance of the lamelle is indeed quite 
similar, with the exception that Rodeo has a preponderance of the 
wider lamelle, sufficient, in the author’s opinion, to warrant class- 
ing it as a medium octahedrite. Bella Roca is classed as a fine 
octahedrite by Brezina. There is also a similarity between the 
two irons in the fact that the schreibersite inclusions follow the 
octahedral lamella, in their orientation. The schreibersite in Rodeo, 
* Wiener Sammlung, 1895, p. 271. 
