Bulletin Article

 

Select lacustrine and marine depositional settings show a spectrum of styles of carbonate deposition and illustrate the types of carbonates, with an emphasis on microbialites and tufa, to be expected in early rift settings. Early rift lake examples examined in this review article are all from East Africa: Lakes Turkana, Bogoria, Natron and Magadi, Manyara, and Tanganyika. Other lake examples include four from the western United States (Great Salt Lake and high lake level Lake Bonneville, Mono Lake and high lake level Russell Lake, Pyramid Lake and high lake level Lake Lahontan, and Searles Lake) and two from Australia (Lakes Clifton and Thetis). Marine basin examples are the Hamelin Pool part of Shark Bay from Australia (marginal marine) and the Red Sea (marine rift).

Landsat images and digital elevation models for each example are used to delineate present and past lake-basin margins based on published lake-level elevations, and for some examples, the shorelines representing different lake levels can be compared to evaluate how changes in size, shape, and lake configuration might have impacted carbonate development. The early rift lakes show a range of characteristics to be expected in lacustrine settings during the earliest stages of continental extension and rifting, whereas the Red Sea shows well advanced rifting with marine incursion and reef–skeletal sand development. Collectively, the lacustrine examples show a wide range of sizes, with several of them being large enough that they could produce carbonate deposits of potential economic interest. Three of the areas—Great Salt Lake and high lake level Lake Bonneville, Pyramid Lake and high lake level Lake Lahontan, and the Red Sea—are exceedingly complex in that they illustrate a large degree of potential depositional facies heterogeneity because of their size, irregular pattern, and connectivity of subbasins within the overall basin outline.

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Events Blog

 

Be a part of the most vibrant and vital integrated science and technology event for unconventional play development. URTeC remains the only event that brings the entire asset team together under one roof to connect on all things unconventional.

American Association of Petroleum Geologists (AAPG)
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Update and expand your ability to analyze the economics of projects or existing production. This short courses offers you the opportunity to better understand the principles of petroleum economics; including the value of money, quantifying financial risks in petroleum investments, rates of return, forecasting cash flows and the fundamentals of capital budgeting.

American Association of Petroleum Geologists (AAPG)
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Share your ideas, innovations and experiences at the Unconventional Resources Technology Conference (URTeC) and be part of the most vibrant and vital integrated science and technology event for unconventional play development.

American Association of Petroleum Geologists (AAPG)
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Explorer Article

 

Recent debates have flared in the western United States over federal versus state ownership of public lands. Bills concerning the transfer of some public lands to states have been introduced in the U.S. Congress and many western state legislatures, though none have become law.

American Association of Petroleum Geologists (AAPG)
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Explorer Division Column DEG

 

From mid-September through mid-October, I had the unique opportunity to represent the Division of Environmental Geosciences at four events, and want to share some of the highlights with you.

American Association of Petroleum Geologists (AAPG)
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Explorer Division Column DPA

 
In the interest of continuing my theme of “Spreading the Word” about AAPG’s Division of Professional Affairs, here’s an update on some exciting events organized by DPA members for the spring of 2016. Many of you may be familiar with the Playmaker concept, as we have previously held five very successful events.
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Explorer Emphasis

 
Feisty. Funny. Determined. Competitive. Brilliant. Generous. The words used to describe Harris in advance of her posthumously receiving the AAPG Harrison Schmitt Award at the upcoming ACE in Denver.
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Wyoming has a number of firsts going for it: the first state that gave women the right to vote, for example, and the first to have a national park and monument (Yellowstone and Devil’s Tower respectively).

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Explorer ProTracks

 

The Pacific Section’s Young Professionals Special Interest Group is working to be more involved and active in the wake of the current industry environment.

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