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De kemiske Undersøgelser af Biloculinleret viser, at
dets mineralske Blandingsdele er af en forholdsvis ensartet
Sammensætning. Nogen væsentlig Forskjel i denne
Retning linder man imidlertid hellerikke ved Sammenligning
af Biloculinleret med det graa underliggende Ler. Den
eneste -bestemte Forskjel mellem disse Sedimenter er
Oxy-dationsgraden. Det synes ikke urimeligt at Biloculinlerets
stærkere Oxydation (der er Aarsag i dets brune Farve)
kan være bevirket af Dyrelivet. En Modsigelse er det
imidlertid at Oxydationen tilsyneladende er stærkest i det
mest kalkfattige Parti af Biloculinleret.
Jeg haaber senere efter en mikroskopisk Undersøgelse
af Bundprøvene at kunne belyse clisse og de øvrige
Spørgsmaal om Slamarternes Dannelse nærmere.
Til Slutning vil jeg udtale min Tak til DHrr.
Professorer Brøgger, Mohn, Sars og AVaage for den Bistand,
cle velvillig har ydet mig.
Disse Undersøgelser er udførte paa Universitetets
kemiske Laboratorium paa Hr. Prof. Waages Afdeling fra
Mai 1880 til April 1881.
Kristiania, Juli 1881.
From the chemical investigation of Biloculina clay,
it appears that the mineral constituents of this substance
are comparatively uniform. Meanwhile, there is noc
onsid-erable difference in this respect between Biloculina
clay-and the grey underlying clay. The only essential
difference distinguishing these sedimentary substances, consists
in the degree of oxidation. It is not improbable that the
higher degree of oxidation distinguishing Biloculina clay —
and to which its brown colour must be ascribed — may
arise from animal life. It would seem, however, to be in
direct opposition to this view, that oxidation occurs in a
higher degree throughout that portion of the Bilooulina
clay which contains the least amount of lime.
Later, after undertaking a microscopic examination
of the bottom-samples, I hope to throw further light on
these and the other questions affecting the formation of
oceanic deposits.
In conclusion, I will thank Professors Brøgger, Mohn,
Sars, and Waage for the assistance tliey have kindly
afforded me.
The investigations set forth in this Memoir were
made in the Chemical Laboratory of the University, in
Professor Waage’s department, aud exteuded from May
1880 to April 1881.
Christiania, July 1881.
Translated into English by John Hazeland.
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