FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W4248333602> ?p ?o ?g. }

• W4248333602 abstract "<strong class=journal-contentHeaderColor>Abstract.</strong> As atmospheric carbon dioxide (CO<span class=inline-formula>₂</span>) and temperatures increase with modern climate change, ancient hothouse periods become a focal point for understanding ecosystem function under similar conditions. The early Eocene exhibited high temperatures, high CO<span class=inline-formula>₂</span> levels, and similar tectonic plate configuration as today, so it has been invoked as an analog to modern climate change. During the early Eocene, the greater Green River Basin (GGRB) of southwestern Wyoming was covered by an ancient hypersaline lake (Lake Gosiute; Green River Formation) and associated fluvial and floodplain systems (Wasatch and Bridger formations). The volcaniclastic Bridger Formation was deposited by an inland delta that drained from the northwest into freshwater Lake Gosiute and is known for its vast paleontological assemblages. Using this well-preserved basin deposited during a period of tectonic and paleoclimatic interest, we employ multiple proxies to study trends in provenance, parent material, weathering, and climate throughout 1 million years. The Blue Rim escarpment exposes approximately 100 m of the lower Bridger Formation, which includes plant and mammal fossils, solitary paleosol profiles, and organic remains suitable for geochemical analyses, as well as ash beds and volcaniclastic sandstone beds suitable for radioisotopic dating. New <span class=inline-formula>⁴⁰</span>Ar <span class=inline-formula><math xmlns=http://www.w3.org/1998/Math/MathML id=M4 display=inline overflow=scroll dspmath=mathml><mo>/</mo></math><span><svg:svg xmlns:svg=http://www.w3.org/2000/svg width=8pt height=14pt class=svg-formula dspmath=mathimg md5hash=57ee8123d9c9aefcf23d9c7f6463c158><svg:image xmlns:xlink=http://www.w3.org/1999/xlink xlink:href=cp-17-2515-2021-ie00001.svg width=8pt height=14pt src=cp-17-2515-2021-ie00001.png/></svg:svg></span></span> <span class=inline-formula>³⁹</span>Ar ages from the middle and top of the Blue Rim escarpment constrain the age of its strata to <span class=inline-formula>∼</span> 49.5–48.5 Myr ago during the “falling limb” of the early Eocene Climatic Optimum. We used several geochemical tools to study provenance and parent material in both the paleosols and the associated sediments and found no change in sediment input source despite significant variation in sedimentary facies and organic carbon burial. We also reconstructed environmental conditions, including temperature, precipitation (both from paleosols), and the isotopic composition of atmospheric CO<span class=inline-formula>₂</span> from plants found in the floral assemblages. Results from paleosol-based reconstructions were compared to semi-co-temporal reconstructions made using leaf physiognomic techniques and marine proxies. The paleosol-based reconstructions (near the base of the section) of precipitation (608–1167 mm yr<span class=inline-formula>^−1</span>) and temperature (10.4 to 12.0 <span class=inline-formula>^∘</span>C) were within error of, although lower than, those based on floral assemblages, which were stratigraphically higher in the section and represented a highly preserved event later in time. Geochemistry and detrital feldspar geochronology indicate a consistent provenance for Blue Rim sediments, sourcing predominantly from the Idaho paleoriver, which drained the active Challis volcanic field. Thus, because there was neither significant climatic change nor significant provenance change, variation in sedimentary facies and organic carbon burial likely reflected localized geomorphic controls and the relative height of the water table. The ecosystem can be characterized as a wet, subtropical-like forest (i.e., paratropical) throughout the interval based upon the floral humidity province and Holdridge life zone schemes. Given the mid-paleolatitude position of the Blue Rim escarpment, those results are consistent with marine proxies that indicate that globally warm climatic<span id=page2516/> conditions continued beyond the peak warm conditions of the early Eocene Climatic Optimum. The reconstructed atmospheric <span class=inline-formula><i>δ</i>¹³</span>C value (<span class=inline-formula>−</span>5.3 ‰ to <span class=inline-formula>−</span>5.8 ‰) closely matches the independently reconstructed value from marine microfossils (<span class=inline-formula>−</span>5.4 ‰), which provides confidence in this reconstruction. Likewise, the isotopic composition reconstructed matches the mantle most closely (<span class=inline-formula>−</span>5.4 ‰), agreeing with other postulations that warming was maintained by volcanic outgassing rather than a much more isotopically depleted source, such as methane hydrates." @default.
• W4248333602 created "2022-05-12" @default.
• W4248333602 date "2021-05-28" @default.
• W4248333602 modified "2023-09-28" @default.
• W4248333602 title "Comment on cp-2021-45" @default.
• W4248333602 doi "https://doi.org/10.5194/cp-2021-45-rc1" @default.
• W4248333602 hasPublicationYear "2021" @default.
• W4248333602 type Work @default.
• W4248333602 citedByCount "0" @default.
• W4248333602 crossrefType "peer-review" @default.
• W4248333602 hasBestOaLocation W42483336021 @default.
• W4248333602 hasConcept C109007969 @default.
• W4248333602 hasConcept C111368507 @default.
• W4248333602 hasConcept C112959462 @default.
• W4248333602 hasConcept C120806208 @default.
• W4248333602 hasConcept C127313418 @default.
• W4248333602 hasConcept C132651083 @default.
• W4248333602 hasConcept C151730666 @default.
• W4248333602 hasConcept C185515318 @default.
• W4248333602 hasConcept C76123530 @default.
• W4248333602 hasConcept C95869378 @default.
• W4248333602 hasConceptScore W4248333602C109007969 @default.
• W4248333602 hasConceptScore W4248333602C111368507 @default.
• W4248333602 hasConceptScore W4248333602C112959462 @default.
• W4248333602 hasConceptScore W4248333602C120806208 @default.
• W4248333602 hasConceptScore W4248333602C127313418 @default.
• W4248333602 hasConceptScore W4248333602C132651083 @default.
• W4248333602 hasConceptScore W4248333602C151730666 @default.
• W4248333602 hasConceptScore W4248333602C185515318 @default.
• W4248333602 hasConceptScore W4248333602C76123530 @default.
• W4248333602 hasConceptScore W4248333602C95869378 @default.
• W4248333602 hasLocation W42483336021 @default.
• W4248333602 hasOpenAccess W4248333602 @default.
• W4248333602 hasPrimaryLocation W42483336021 @default.
• W4248333602 hasRelatedWork W1756969522 @default.
• W4248333602 hasRelatedWork W1978330345 @default.
• W4248333602 hasRelatedWork W1982621864 @default.
• W4248333602 hasRelatedWork W2006971405 @default.
• W4248333602 hasRelatedWork W2103480279 @default.
• W4248333602 hasRelatedWork W2104696163 @default.
• W4248333602 hasRelatedWork W2325222095 @default.
• W4248333602 hasRelatedWork W2355033796 @default.
• W4248333602 hasRelatedWork W2358767296 @default.
• W4248333602 hasRelatedWork W2978339379 @default.
• W4248333602 isParatext "false" @default.
• W4248333602 isRetracted "false" @default.
• W4248333602 workType "peer-review" @default.