THE DEPTH AND MARINE DEPOSITS OF THE PACIFIC OCEAN. 153 
DISTRIBUTION OF MARINE DEPOSITS IN THE PACIFIC 
OCEAN. 
Dr. Agassiz’s explorations have greatly increased the area with depths 
between 2000 and 3000 fathoms in the southeastern Pacific, which likewise 
increases the area covered by deposits of Globigerina Ooze, for this type of 
deposit is most widely distributed in these depths. 
On Map II. accompanying this paper the distribution of the different 
types of deposits is shown by different colors. “No attempt is made to 
indicate the distribution of all the individual types of terrigenous deposits, 
Coral Muds and Coral Sands being shown by a yellow color, while the re- 
maining types of terrigenous deposits (Volcanic Muds and Sands, Green 
Muds and Sands, Red Muds, and Blue Muds) are all included in the blue 
color on the map. A similar map was published in Dr. Agassiz’s prelimi- 
nary report’ in January, 1902, the principal modification being the large 
area of Globigerina Ooze now introduced in the southeast Pacific, as the 
result of the recent cruise of the “Albatross.” 
Planimeter measurements give the following approximate areas cov- 
ered by the various types of deposits within the Pacific Ocean, as already 
defined, and the percentages to the total area: — 
Square Miles. Per Cent. 
HNO OIE wade ee Ol, week ee Cm 29,300,000 47.0 
iglopiporma Oo76.- a ne 16,540,000 26.5 
WIA OLR a tae gor ceaes fe, a ar, 3,630,000 5.9 
Had1Ola rian O06 2 es 3,330,000 5.5 
CLO POd OOLCe icc yas 120,000 0.2 
Coral Mud-and Sando ee ae, 1,330,000 2.1 
Other terrigenous deposits ..... 8,040,000 12.8 
62,290,000 100.0 
This table shows that by far the most important deposit in the Pacific 
is the Red Clay, which is estimated to cover an area nearly twice as large 
as that covered by Globigerina Ooze, and about eight times greater than 
that covered by either Diatom Ooze or Radiolarian Ooze. A glance at 
the map corroborates this statement, for it is seen that Red Clay occupies 
1 Mem. Mus. Comp. Zoil., vol. XXVI., no. 1, Map IA. 
