The deep boring at Spur . Figure 6. a, Lagena (?), 4445-4450 feet below surface; b, Sac-cammina (?), 4385-4390, 4405-4410, 4415-4420, 4435^440, 4465-4470,4480-4485, 4485-4489 feet; c, Lagena (?), 4485-4489 feet; d, Lagena(?), 4415-4420 feet. X 40. There are a number of delicate tubular organisms, of apparentlyhomogeneous texture, which resemble in form Trochammina gor-dialis and incerta, figured by Brady. The shell is sometimes of ferru-ginous color, but also colorless. All are more or less chitinous. Mostof the forms are small. Figure 7: a— fno^^T^ ^ Tro=^ammina incerta dOrbigny, a, 4305-4
The deep boring at Spur . Figure 6. a, Lagena (?), 4445-4450 feet below surface; b, Sac-cammina (?), 4385-4390, 4405-4410, 4415-4420, 4435^440, 4465-4470,4480-4485, 4485-4489 feet; c, Lagena (?), 4485-4489 feet; d, Lagena(?), 4415-4420 feet. X 40. There are a number of delicate tubular organisms, of apparentlyhomogeneous texture, which resemble in form Trochammina gor-dialis and incerta, figured by Brady. The shell is sometimes of ferru-ginous color, but also colorless. All are more or less chitinous. Mostof the forms are small. Figure 7: a— fno^^T^ ^ Tro=^ammina incerta dOrbigny, a, 4305-4310, 4475-4480feet below surface; b, 4385-4390 feet; Trochammina eordiali^i Tonesf^.^.^^ 4395-4400, 4405-4410feet; d, ^25-4430 4445^4504455-4460, 4465^4470, 4475-4480, 4485-4490• e 4405-4410 4425144^04445-4450 feet; f, 4395-4400, , 4415-1420 4425-443oieetg, 4480-4485 feet; h, 4415-4420, 4425-4430, feet X 40 Flat spirally-coiled tubes of chitinous material were noted at from4150 feet to the bottom of the well. These resemble the genusAmmodiscus. In the diameter of the tube they differ considerably,and also m the number of coils. In some the inner whorls are ofabout the same diameter as the outer, and at the center is usuallyseen a chamber, which often has a wider diameter than the the inner whorls are very small no such chamber is seen The Deep Boring at Spur 79 The discs range from to mm. in diameter. Figure 8: a, b, tests were noted which had an exterior resemblance toValvulina bulloides as
Size: 2366px × 1056px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauth, bookcentury1900, bookdecade1910, bookidcu31924004622084
