148  BIBLIOGRAPHY    OF    NORTH    AMERICAN    GEOLOGY 
Gunther  (Charles  Godfrey). 
1.  The  gold  deposits  of  Plomo,  San  Luis  Park,  Colorado. 
Econ.  Geol.,  vol.  1,  pp.  143-154,  7  figs.,  1905. 
Describes  the  general  geology,  the  lithologic  characters  of  the  rocks,  and  the  character,  occur- 
rence, and  relations  of  the  ore  bodies. 
2.  An  interesting  fault-system  [California]. 
Eng.  and  Mg.  Jour.,  vol.  80,  p.  1013,  1  fig.,  1905. 
Guppy  ( R.  J.  Lechmere) . 
1.  On  the  occurrence  of  gold  and  coal  in  Trinidad.     With  a  brief  sketch  of  the  geo- 
logical history  of  the  island. 
Trinidad,  Victoria  Institute,  Industrial  Trinidad,  pp.  520-531,  1903. 
2.  On  some  samples  of  rock  from  borings  at  Sangregrande,  Trinidad.     Part  I. 
Trinidad,  Victoria  Inst.,  Proc,  vol.  2,  pp.  1-5, 1  pi.,  1904. 
Describes  the  material  obtained  from  borings  and  gives  a  list  of  and  notes  upon  the  fossils 
identified  therein.' 
3.  The  Sangregrande  borings.     Part  II. 
Trinidad,  Victoria  Inst.,  Proc,  vol.  2,  pp.  5-7,  1904. 
4.  Observations  on  some  of  the  Foraminifera  of  the  oceanic  rocks  of  Trinidad. 
Trinidad,  Victoria  Inst.,  Proc,  vol.  2,  pp.  7-16,  2  pis.,  1904. 
5.  Preliminary  geological  notes  on  the  Marbela  Manjak  mine  [Trinidad]. 
Trinidad,  Victoria  Inst.,  Proc,  vol.  2,  pp.  16-17,  1904. 
6.  Note  on  the  Komuto  shell-bed. 
Trinidad,  Victoria  Inst.,  Proc,  vol.  2,  p.  17,  1904. 
7.  Tobagan   fossils.      On  some  specimens  of   fossils   from  Tobago  in  the  Victoria 
Museum,  Trinidad. 
Trinidad,  Botan.  Dept  ,  Bull.  no.  514,  1904,  2  pp. 
Gives  notes  on  the  occurrence  of  some  molluscan  shells. 
8.  The  growth  of  Trinidad. 
Can.  Inst.,  Trans.,  vol.  8,  pp.  137-149,  9  figs.,  1905. 
Describes  the  process  of  formation  of  the  island  of  Trinidad. 
Gwillim  (J.  C). 
1.  Report  on  the  Atlin  mining  district,  British  Columbia. 
Can.  Geol.  Surv.,  Ann.  Rept,  new  ser.,  vol.  12,  pp.  1B-48B,  5  pis.,  map,  1902. 
Discusses  physiographic  features,  geologic  structure  and  petrology  of  this  area,  and  character 
and  distribution  of  the  gold-bearing  gravels. 
2.  Characteristics  of  the  Atlin  gold  field  [British  Columbia]. 
Can.  Mg.  Review,  vol.  21,  pp.  13-16,  1902. 
Describes  the  general  topography  and  geology  of  the  region  and  the  occurrence  of  placer 
gold. 
3.  Glaciation  in  the  Atlin  district,  British  Columbia. 
Jour.  Geol.,  vol.  10,  pp.  182-185,  1902. 
Describes  the  valleys  and  local  glaciers  of  the  region. 
4.  Notes  on  some  western  coals. 
Can.  Mg.  Inst.,  Jour.,  vol.  7,  pp.  422-424,  1904. 
Gives  observations  upon  the  occurrence  and  character  of  coals  in  Alberta  and  British  Colum- 
bia, and  their  geologic  horizons. 
5.  Notes  on  the  life  history  of  coal  seams. 
Can.  Mg.  Inst.,  Jour.,  vol.  8,  pp.  235-243,  1905. 
Discusses  origin  of  coal  and  the  composition  of  some  Canadian  coals. 
H. 
Haanel  (Eugene). 
1.  Discussion  of  Mr.  W.  M.  Brewer's  paper  on  "The  rock-slide  at  Frank,  Alberta 
Territory,  Canada." 
Inst.  Mg.  Engrs.,  Trans.,  vol.  26,  pp.  157-163,  1904. 
