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Diverse and abundant lipid biomarker assemblages have been reported from a variety of Proterozoic marine environments from the careful analysis of well-preserved rocks and oils. These molecular biosignatures have provided unique insights into the communities and the environmental conditions which characterized the Proterozoic marine biosphere. We summarize some of the major temporal patterns evident in Proterozoic lipid biomarkers found to date, whilst emphasizing the scale of local heterogeneity found within Neoproterozoic oceans from region to region, and their relationship with the evolving ecological, climatic and ocean/atmospheric redox conditions. Short commentaries on a selection of papers published from the last 15 years of biomarker literature are given. The focus here is on key studies, highlighted for further reading, which have helped to better constrain the timing of the ecological expansion of eukaryotes in Proterozoic oceans or which have impacted on our knowledge of the biological sources of Proterozoic biomarkers.
In life, there are times you are granted a miracle. It may not be the one you wanted exactly, but it will be the one you need. It will prepare you for the next step in your journey and help you learn to accept the life you are given, even if that life can be heartbreaking.
Author Penny Lane decides to team up with fellow author Kain Brooks because she believes the collaboration will bring something refreshing and new to her humdrum life. It is at first, but what she doesn't count on is developing feelings for a man that's hundreds of miles away while continuing to struggle with the death of her fiance, Zack. The newly divorced Kain is excited about the partnership and happily realizes that it may lead to much more than just a book. However, there is a threat A stalker's evil intentions are far more serious than either of them can ever imagine-- so serious that they may not make it long enough to discover if their feelings are genuine or just a long-distanced crush."
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