1-20 OF 172 RESULTS FOR

cyanobacteria

Results shown limited to content with bounding coordinates.
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Journal Article
Journal: PALAIOS
Published: 01 July 2017
PALAIOS (2017) 32 (7): 462–489.
...LIJING LIU; YASHENG WU; HONGXIA JIANG; NAIQIN WU; LIANQI JIA Abstract: The stratigraphic and facies distribution of 20 calcimicrobial genera (including calcified cyanobacteria and associated problematic calcified microfossils) are reported for the entire Ordovician succession in the Tarim Basin...
FIGURES | View All (17)
Journal Article
Journal: Interpretation
Published: 16 March 2017
Interpretation (2017) 5 (2): SF225–SF242.
... in the middle of the Chang 7 may indicate the presence of freshwater cyanobacteria blooms that corresponds to a period of maximum lake expansion. The OM deposited in deeper parts of the lake is dominated by oil-prone type I or type II kerogen or a mixture of both. The OM deposited in shallower settings...
FIGURES | View All (9)
Journal Article
Published: 06 March 2017
Journal of Paleontology (2017) 91 (3): 369–392.
...Min Shi; Qing-Lai Feng; Maliha Zareen Khan; Stanley Awramik; Shi-Xing Zhu Abstract Cherts and silicified dolostones of the ca. 1600 Ma Dahongyu Formation (uppermost Changcheng Group) from North China contain well-preserved microfossils. Cyanobacteria filaments and coccoids dominate the studied...
FIGURES | View All (13)
Journal Article
Journal: Geology
Published: 01 December 2016
Geology (2016) 44 (12): 1007–1010.
... (fungi, cyanobacteria) are more representative of early soil-forming communities. Liverwort and lichen soils are thin, and their depth and complexity are constrained by the size and growth form of the dominant plants or lichens. They are aggregated and stabilized by cyanobacteria, mycorrhizal...
Journal Article
Journal: Geology
Published: 01 August 2016
Geology (2016) 44 (8): 615–618.
FIGURES
Journal Article
Journal: Geology
Published: 01 July 2016
Geology (2016) 44 (7): 579–582.
... throughout geologic history, the exceptional preservation of microbes in Ediacaran sediments suggests the potential for a unique taphonomic window. Here, we identify conditions conducive to the fossilization of filamentous cyanobacteria growing in the presence of siliciclastic sand and demonstrate...
Journal Article
Published: 01 June 2016
Journal of Sedimentary Research (2016) 86 (6): 629–636.
... descriptions and classifications for tropical tidal-flat environments have focused predominantly on morphological observations. This is exemplified by flat and biscuit-shaped mats, where the mat morphotypes are postulated to reflect different Cyanobacteria communities as the main mat-building taxa. To compare...
FIGURES
Journal Article
Journal: PALAIOS
Published: 01 November 2015
PALAIOS (2015) 30 (11): 792–801.
.... Following day 7 (C) the fish carcasses are already being trapped by cyanobacteria filaments. D ) Fish completely covered by the microbial mat. The arrow points to fish position. E – G ) Days 2, 7, and 90 of the control sediment. Extensive decay is observed during the first week (F); after 90 days...
FIGURES | View All (7)
Journal Article
Journal: Geology
Published: 01 October 2015
Geology (2015) 43 (10): 855–858.
... dense mazes of filamentous fossils, which were interpreted as algae or cyanobacteria, thus pointing to a shallow-marine subtidal or intertidal environment. The data presented here reveal that these filaments represent remains of colorless, vacuolated sulfide-oxidizing bacteria. This interpretation...
FIGURES
Journal Article
Journal: Geology
Published: 01 October 2015
Geology (2015) 43 (10): 887–890.
... occurred locally as much as 2.8 b.y. ago, creating O 2 oases, or initiated just prior to the GOE. The biogeochemical dynamics of possible O 2 oases have been poorly constrained due to the absence of modern analogs. However, cyanobacteria in microbial mats in a perennially anoxic region of Lake Fryxell...
FIGURES
Journal Article
Published: 01 October 2015
Journal of Sedimentary Research (2015) 85 (10): 1213–1227.
...Dina M. Bower; Daniel R. Hummer; Andrew Steele; Atsushi Kyono Abstract: Changes in composition during the transition from sediment to rock are usually attributed to long, complicated histories and atmospheric influences, while the contribution of benthic mat-building cyanobacteria is not typically...
FIGURES | View All (8)
Journal Article
Published: 05 August 2015
Geological Magazine (2015) 152 (6): 1145–1148.
... this strata interval, other characteristic Ediacaran microorganisms co-occur such as cyanobacteria, vendotaenids, microalgae, Ceratophyton , Valkyria and macroscopic annelidan Sabellidites . The recent contributions of organic sclerites in revealing the scope of the Cambrian explosion are therefore also...
FIGURES
Journal Article
Published: 08 April 2015
Journal of the Geological Society (2015) 172 (3): 390–406.
... utilization by cyanobacteria or sulphur bacteria leading to negative kerogen δ 15 N values. During Stage 3, dissolved oxygen and sulphate concentrations were significantly increased, and thus the oxidized surface water and the redox transition zone overlying a euxinic bottom water may have been expanded...
FIGURES | View All (11)
Journal Article
Journal: Elements
Published: 01 February 2015
Elements (2015) 11 (1): 14–15.
Journal Article
Journal: Geology
Published: 01 January 2015
Geology (2015) 43 (1): 79–82.
...Jeremiah Shuster; Gordon Southam Abstract Gold colloids, octahedral platelets, and foils, directly and indirectly formed from the reduction of soluble Au(I) thiosulfate and Au(III) chloride complexes by iron-oxidizing bacteria, cyanobacteria, and sulfate-reducing bacteria, were combined...
FIGURES
Journal Article
Journal: Geology
Published: 01 August 2014
Geology (2014) 42 (8): 671–674.
... is currently, and may in the past have been, fertilized by atmospheric dust, promoting the fixation of atmospheric N 2 by cyanobacteria. These cyanobacteria provided a source of nitrogen to the rest of the community in this nutrient-poor environment. The fixation of N has imparted a characteristic δ 15 N...
FIGURES
Journal Article
Journal: PALAIOS
Published: 01 January 2014
PALAIOS (2014) 29 (1): 27–37.
... patterns of microstromatolites and Girvanella encrusting other surfaces suggest that they were most likely formed by photosynthetic cyanobacteria ( Riding 1991 , 2000 ). The occurrences of microstromatolites in growth positions and their columnar shapes suggest that they were constructors ( Fagerstrom...
FIGURES | View All (8)
Series: GSA Reviews in Engineering Geology
Published: 01 January 2014
DOI: 10.1130/2014.4122(16)
EISBN: 9780813758220
... Abstract Biological soil crusts, composed of soil surfaces stabilized by a consortium of cyanobacteria, algae, fungi, lichens, and/or bryophytes, are common in most deserts and perform functions of primary productivity, nitrogen fixation, nutrient...
FIGURES
Journal Article
Journal: PALAIOS
Published: 01 July 2013
PALAIOS (2013) 28 (7): 453–470.
... filamentous or coccoidal cyanobacteria give way to a series of more robust forms that show increasing assemblage diversity with decreasing evidence of subaerial exposure. Distinct fabric elements are associated with each microbial assemblage, and aspects of these petrofabrics are recognizably preserved within...
FIGURES | View All (15)