R E Summons
Overview
Explore the profile of R E Summons including associated specialties, affiliations and a list of published articles.
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Snapshot
Articles
68
Citations
1227
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0
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Recent Articles
1.
Brunoir T, Mulligan C, Sistiaga A, Vuu K, Shih P, OReilly S, et al.
Nat Commun
. 2023 Dec;
14(1):7941.
PMID: 38040676
Steranes preserved in sedimentary rocks serve as molecular fossils, which are thought to record the expansion of eukaryote life through the Neoproterozoic Era ( ~ 1000-541 Ma). Scientists hypothesize that...
2.
McMahon S, Bosak T, Grotzinger J, Milliken R, Summons R, Daye M, et al.
J Geophys Res Planets
. 2018 Jul;
123(5):1012-1040.
PMID: 30034979
The Martian surface is cold, dry, exposed to biologically harmful radiation and apparently barren today. Nevertheless, there is clear geological evidence for warmer, wetter intervals in the past that could...
3.
Hawes I, Jungblut A, Matys E, Summons R
Geobiology
. 2018 Mar;
16(4):369-377.
PMID: 29527802
The Cryogenian (~717-636 Ma) is characterized by widespread glaciation and dramatic fluctuations in biogeochemical cycling during the Sturtian and Marinoan glaciations. The Snowball Earth hypothesis posits that during this period,...
4.
Hamilton T, Welander P, Albrecht H, Fulton J, Schaperdoth I, Bird L, et al.
Geobiology
. 2017 Oct;
15(6):784-797.
PMID: 29035021
Little Salt Spring (Sarasota County, FL, USA) is a sinkhole with groundwater vents at ~77 m depth. The entire water column experiences sulfidic (~50 μM) conditions seasonally, resulting in a...
5.
Gold D, OReilly S, Watson J, Degnan B, Degnan S, Kromer J, et al.
Geobiology
. 2017 Aug;
15(6):836-843.
PMID: 28851049
Demosponges are a rich natural source of unusual lipids, some of which are of interest as geochemical biomarkers. Although demosponges are animals, they often host dense communities of microbial symbionts,...
6.
Matys E, Sepulveda J, Pantoja S, Lange C, Caniupan M, Lamy F, et al.
Geobiology
. 2017 Aug;
15(6):844-857.
PMID: 28771908
Marine oxygen minimum zones (OMZs) are characterized by the presence of subsurface suboxic or anoxic waters where diverse microbial processes are responsible for the removal of fixed nitrogen. OMZs have...
7.
OReilly S, Mariotti G, Winter A, Newman S, Matys E, McDermott F, et al.
Geobiology
. 2016 Jul;
15(1):112-130.
PMID: 27378151
Ooids are sedimentary grains that are distributed widely in the geologic record. Their formation is still actively debated, which limits our understanding of the significance and meaning of these grains...
8.
Freissinet C, Glavin D, Mahaffy P, Miller K, Eigenbrode J, Summons R, et al.
J Geophys Res Planets
. 2015 Dec;
120(3):495-514.
PMID: 26690960
Key Points: First in situ evidence of nonterrestrial organics in Martian surface sediments Chlorinated hydrocarbons identified in the Sheepbed mudstone by SAM Organics preserved in sample exposed to ionizing radiation...
9.
Williford K, Ushikubo T, Lepot K, Kitajima K, Hallmann C, Spicuzza M, et al.
Geobiology
. 2015 Oct;
14(2):105-28.
PMID: 26498593
An approach to coordinated, spatially resolved, in situ carbon isotope analysis of organic matter and carbonate minerals, and sulfur three- and four-isotope analysis of pyrite with an unprecedented combination of...
10.
French K, Rocher D, Zumberge J, Summons R
Geobiology
. 2015 Jan;
13(2):139-51.
PMID: 25631735
A comprehensive marine biomarker record of green and purple sulfur bacteria (GSB and PSB, respectively) is required to test whether anoxygenic photosynthesis represented a greater fraction of marine primary productivity...