110 



COLLECTOR S MANUAL 



can designate the fossiliferous layer by a letter or number, 



stating its relation to another conspicuous stratum at the 



collecting locality. 



In recording geographi- 

 cal data the location should 

 be so specific that the ex- 

 act collecting spot can be 

 found at any time in the 

 future. If location is by 

 military coordinates state 

 from what map they were 

 taken. Latitude and longi- 

 tude can be measured as 

 coordinates from most 

 maps. If locating from a 

 village state distance from 

 a prominent, permanent 

 landmark such as the 

 square, prominent church, 

 or courthouse. Elsewhere 

 make locations with refer- 

 ence to a prominent hill, 

 mountain, or other perma- 

 nent natural feature. Such 



locations are best given with azimuth bearing and distance from 



such major landmark, again stating from what map the reading 



was plotted. 

 Write all labels in black pencil on good stout paper. Pencil 



writing: will not smudge or be obliterated if wet. Record the 



Fig. 65. — A trilobite. 



