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Origin of the Myklegardfjellet Bed, a basal Cretaceous marker on Spitsbergen (1992)

DYPVIK, HENNING ; NAGY, JENø ; KRINSLEY, DAVE H.

Oxford, UK : Blackwell Publishing Ltd

Polar research 11 (1992), S. 0

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ISSN: 1751-8369

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Geography , Geosciences

Notes: The Ryazanian Myklegardfjellet Bed, composed of yellow to greenish plastic clays, is a regional marker horizon in central and eastern Spitsbergen, where it occurs just above the boundary between the Agardhfjellet and Rurikfjellet formations. Through a combined mineralogical, sedimentological and micropaleontological approach, it is demonstrated that the bed was deposited by marine shelf processes and subsequently altered by decomposition of the unstable glauconite bearing components. These sediments were deposited at the culmination of a shallowing episode in the depositional area. This event marks a shift in depositional mode, from predominantly shelf sedimentation controlled by global eustatic sea level changes (Late Bathonian-Ryazanian), to a locally regulated, deep sea to shallow shelf-prodeltaic to deltaic pattern of deposition (Ryazanian-Hauterivian).

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1111/j.1751-8369.1992.tb00409.x

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Biodegradation of slop oil from a petrochemical industry and bioreclamation of slop oil contaminated soil (1994)

Dave, H. ; Ramakrishna, C. ; Bhatt, B. D. ; [et al.]

Springer

World journal of microbiology and biotechnology 10 (1994), S. 653-656

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ISSN: 1573-0972

Keywords: Biodegradation ; bioreclamation ; petrochemical waste oil ; phytotoxicity ; soil contamination

Source: Springer Online Journal Archives 1860-2000

Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology

Notes: Abstract Slop oil, i.e. waste oil from a petrochemical complex, contains at least 240 hydrocarbon components, of which 54% are from C5 to C11 and the rest from C12 to C23. Of 22 isolated bacterial cultures that were able to degrade slop oil, seven could each degrade about 40% of the slop oil, and a mixture of all seven could degrade ≤50% in liquid medium. Bioaugmentation of soil contaminated with slop oil with the mixed bacterial culture gave up to 70% degradation of slop oil after 30 days. This compares with 40% degradation without bioaugmentation. Bioaugmentation led to a significant increase in counts of bacteria able to degrade slop oil. Wheat sown on bioaugmented soil germinated and grew better than on non-augmented soil and led to increased degradation of slop oil (up to 80%). This indicates the potential of mixed culture for bioremediation.