Full resolution (JPEG) - On this page / på denna sida - Sidor ...
<< prev. page << föreg. sida << >> nästa sida >> next page >>
Below is the raw OCR text
from the above scanned image.
Do you see an error? Proofread the page now!
Här nedan syns maskintolkade texten från faksimilbilden ovan.
Ser du något fel? Korrekturläs sidan nu!
This page has never been proofread. / Denna sida har aldrig korrekturlästs.
47
Eiland og Spidsbergen, er Kalkgehalten fundet betydelig
høiere end i -den sydvestligere Del af Østhavet.
in the map to have a surface-layer of Rhabdammina clay,’
the sample was found to contain a proportion of lime
considerably in excess of that distinguishing the same kind of
deposit from the south-western tract of the East Sea.
Station. • Nordlig Bredde. (.V, Latitude.) 0. Længde fra Greenw. (Long, from Greenw. E.) Dybde i ■engl. Favne. (Depth in Eng. Fath.) CaCO, Feä03 FeÖ Samlet Fe (Total Fe.) Fe2 O3: FeO Anmærkninger. (Remarks.)
264 7O0 56’ 35° 37’ 86 2-54 0.24 2.48 2.og 0.09
266 ?! 27 35 39 ■30 Spor (Traces.) 2-57 2-45 3-70 1.02 1 Underliggende On an Under \ Lag mørkgraat, Layer of compact, I fast Ler1. dttrk-grey Clay.1
267 VI 42 37 .1 148 O.5O 1.00 2.05 2.29 0.49
268 ?! 36 36 18 . 130 O.48 i.21 ■•52 2.O3 0.78
270 72 ■ 27 35 i ■36 Spor (Traces.) ■•5i 1.7 i 2-39 0.88
275 74 8 31 12 147 1-59 ■•32 3-23 3-43 0.41
326 75 32 17’ 50 ■23 16.82 1.19 2.51 2.78 0.47
Dette er rimeligvis at betragte som en Tilfældighed,
da alle de nærliggende Bundprøver (Station 324, 326 og
327) kun bruser svagt for . Syrer.
Med Hensyn til det grønlige Lers Oxydationsgrad
viser det sig, at det .gjennemgaaende indeholder betydelig
mere Jernoxydul i Forhold til Oxydet end de graa ög de
brune Sedimenter. Her maa det tillige bemærkes, at hvor
vi ellers i Nordhavet træffer et Ler med lignende
Blandingsforhold eller med en tilsvarende høi Kiselsyregehalt,
er dette i Almindelighed af en brunlig Farve eller altsaa
stærkere oxyderet, men forekommer tillige meget sjelden
paa saa ringe Dyb som Rhabdammina-Leret.
Nordhavets østlige Del er imidlertid ogsaa en Egn
for sig selv, hvis Særegenheder med Hensyn til Bundens
Formationer vanskeliggjør enhver Sammenligning med dets
øvrige Partier.
Medens vi langs Norges Vestkyst tinder en fra Landet
af mere eller mindre jevnt skraanende Havbund, har
Østhavet selv paa de fjerneste Punkter omtrent den samme
Dybde som lige i Nærheden af Kysterne.
Særegne Betingelser kan saaledes være givne for
Sedimenternes og Dyrelivets Fordeling i denne Egn af Havet,
hvor Dybderne paa mange Steder — i lang Afstand fra
1 Dette gaar altsaa ikke ind under Benævnelsen
Rhabdammina-Ler; men er ogsaa optaget i Tabellen paa Side 43 blandt Prøverne
af det graa Ler.
This, however, is probably a casual occurrence, all
the samples collected in adjacent localities (Ståt. 324, 326,
and 327) effervescing but slightly with acids.
With regard to the degree of oxidation distinguishing
Rhabdammina clay, that greenish deposit generally contains
much more of the protoxide in proportion to the
sesqui-oxide of iron than do any of the grey or brown clays.
Here I must also observe, that wheresoever else on the
bed of the North Atlantic we meet with a clay similar in
composition, or characterized by an equal amount of silica
it will, as a rule, being more highly oxidized, have a
brownish colour, but rarely occur at so moderate a depth
as Rhabdammina clay.
Meanwhile, the eastern sectioii of the North Atlantic
constitutes as regards the naüire of the deposits distributed
over its bed an exceptional locality, whose phenomenal
characteristics well-nigh preclude comparison with the other
parts of that ocean tract.
Along the west coast of Norway the bottom shelves
more or less gradually from the land, whereas in the East
Sea the depth even at the most distant points is almost
the same as in close proximity to the shore.
Hence, peculiar conditions may determine the
distribution of both sedimentary deposit and animal life in this
tract of the ocean, where the depth in numerous localities
1 This part of the sample, which accordingly is not regarded
as Rhabdammina clay, will be found in the Table given on page 43
among the samples of grey clay.
<< prev. page << föreg. sida << >> nästa sida >> next page >>
