You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Creek Limestone of the Molong High. It<br />
resembles the pear-shaped dasycladacean<br />
Apidium Stolley but has a circlet of from 4 to<br />
7 large pores on its upper surface and exhibits<br />
budding from one or more of these pores<br />
2009020148<br />
奥 地 利 卡 尔 阿 尔 卑 斯 北 部 晚 侏 罗 世 钙 质 绿<br />
藻 一 新 种 : Halimeda misiki = Halimeda<br />
misiki n. sp., a new calcareous green alga<br />
from the Late Jurassic of the Northern<br />
Calcaeous Alps (Austria). ( 英 文 ).<br />
Schlagintweit F; Dragastan O; Gawlick H J.<br />
Neues Jahrbuch fur Geologie u. Palaontologie<br />
/ Abhandlungen, 2008, 248(2): 171-182<br />
New species is described from the Late<br />
Jurassic Plassen Carbonate Platform of<br />
Austria. Other occurrences are reported from<br />
the Western and Eastern Carpathians,<br />
Morocco and Sicily/Italy. Halimeda misiki is<br />
characterized especially by a microcrystalline<br />
(micritic) thallus appearence and cortical<br />
filaments distinctly inclined to the longitudinal<br />
axis. The new species was found in shallow<br />
water peri-reefal cabonates of platform margin<br />
facies and resediments in the adjacent<br />
hemipelagic basins.<br />
2009020149<br />
加 拿 大 北 极 地 区 东 部 巴 芬 岛 高 分 辨 晚 冰 期<br />
和 早 全 新 世 硅 藻 记 录 = A high-resolution<br />
late-glacial and early Holocene diatom record<br />
from Baffin Island, eastern Canadian Arctic.<br />
( 英 文 ). Wolfe A P. Canadian Journal of<br />
Earth Sciences, 1996, 33(6): 928–937<br />
An interval of late-glacial to early Holocene<br />
sedimentation, spanning the period 12.9 –<br />
8.4 ka BP ( 14 C dated by accelerator mass<br />
spectrometry), is contained within 15 cm of<br />
gyttja in a core from a small lake on<br />
southwestern Cumberland Peninsula, Baffin<br />
Island. This sediment was subsampled in<br />
continuous 2.5 mm increments for diatom<br />
analysis. Extremely low sediment<br />
accumulation rates (~1.8 cm ka −1 ) are<br />
characteristic of the initial phase of organic<br />
sedimentation, but they increase rapidly (to<br />
14.2 cm ka −1 ) after 9 ka BP. The first 0.5 cm<br />
of gyttja contained an acidophilous diatom<br />
flora resembling that of underlying mineral<br />
sediments. Thereafter, and throughout the late<br />
glacial and earliest Holocene, diatom floras<br />
were dominated by alkaliphilous and<br />
circumneutral species of Fragilaria. Around<br />
9 ka BP, shifts to acidophilous floras<br />
dominated by Brachysira brebissonii, and,<br />
later, Eunotia rhomboidea and Frustulia<br />
rhomboides vars. saxonica and crAn interval<br />
of late-glacial to early Holocene sedimentation,<br />
spanning the period 12.9 – 8.4 ka BP (14C<br />
dated by accelerator mass spectrometry), is<br />
contained within 15 cm of gyttja in a core<br />
from a small lake on southwestern<br />
Cumberland Peninsula, Baffin Island. This<br />
sediment was subsampled in continuous<br />
2.5 mm increments for diatom analysis.<br />
Extremely low sediment accumulation rates<br />
(~1.8 cm ka−1) are characteristic of the initial<br />
phase of organic sedimentation, but they<br />
increase rapidly (to 14.2 cm ka−1) after 9 ka<br />
BP. The first 0.5 cm of gyttja contained an<br />
acidophilous diatom flora resembling that of<br />
underlying mineral sediments. Thereafter, and<br />
throughout the late glacial and earliest<br />
Holocene, diatom floras were dominated by<br />
alkaliphilous and circumneutral species of<br />
Fragilaria. Around 9 ka BP, shifts to<br />
acidophilous floras dominated by Brachysira<br />
brebissonii, and, later, Eunotia rhomboidea<br />
and Frustulia rhomboides vars. saxonica and<br />
crassinervia, suggest a period of natural lake<br />
acidification. High diatom production<br />
accompanied the lowered lake-water pH,<br />
which reflects, respectively, the<br />
paleolimnological response to an early<br />
Holocene climatic optimum, and progressive<br />
depletion of lake alkalinity sources. There is<br />
no evidence of diatom or sediment responses<br />
attributable to the Younger Dryas oscillation,<br />
implying that deglacial reorganizations of the<br />
North Atlantic Ocean did not necessarily<br />
affect paleoclimatic conditions in the southern<br />
Cumberland Sound region assinervia, suggest<br />
a period of natural lake acidification. High<br />
diatom production accompanied the lowered<br />
lake-water pH, which reflects, respectively,<br />
the paleolimnological response to an early<br />
Holocene climatic optimum, and progressive<br />
depletion of lake alkalinity sources. There is<br />
no evidence of diatom or sediment responses<br />
attributable to the Younger Dryas oscillation,<br />
implying that deglacial reorganizations of the<br />
North Atlantic Ocean did not necessarily<br />
affect paleoclimatic conditions in the southern<br />
Cumberland Sound region.<br />
2009020150<br />
新 生 代 海 洋 浮 游 生 物 硅 藻 的 分 异 动 力 =<br />
Diversity dynamics of marine planktonic<br />
diatoms across the Cenozoic. ( 英 文 ). Rabosky<br />
D L; Sorhannus U. Nature, 2009, 457(7226):<br />
183-186<br />
48