Malcolm Walter

Emeritus Professor

  • 7655 Citations
  • 50 h-Index
1967 …2017
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Research Outputs 1967 2017

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Article
2017

Lack of methylated hopanoids renders the cyanobacterium Nostoc punctiforme sensitive to osmotic and pH stress

Garby, T. J., Matys, E. D., Ongley, S. E., Salih, A., Larkum, A. W. D., Walter, M. R., Summons, R. E. & Neilan, B. A., Jul 2017, In : Applied and Environmental Microbiology. 83, 13, p. 1-15 15 p., e00777-17.

Research output: Contribution to journalArticleResearchpeer-review

Nostoc punctiforme
Nostoc
hopanoid
Osmotic Pressure
Cyanobacteria
2015

Hydrocarbons preserved in a ~2.7 Ga outcrop sample from the Fortescue Group, Pilbara Craton, Western Australia

Hoshino, Y., Flannery, D. T., Walter, M. R. & George, S. C., 1 Mar 2015, In : Geobiology. 13, 2, p. 99-111 13 p.

Research output: Contribution to journalArticleResearchpeer-review

asphalt
bitumen
Western Australia
Hydrocarbons
Aromatic Hydrocarbons

Sedimentology, chemostratigraphy, and stromatolites of lower Paleoproterozoic carbonates, Turee Creek Group, Western Australia

Martindale, R. C., Strauss, J. V., Sperling, E. A., Johnson, J. E., Van Kranendonk, M. J., Flannery, D., French, K., Lepot, K., Mazumder, R., Rice, M. S., Schrag, D. P., Summons, R., Walter, M., Abelson, J. & Knoll, A. H., 1 Sep 2015, In : Precambrian Research. 266, p. 194-211 18 p.

Research output: Contribution to journalArticleResearchpeer-review

Sedimentology
chemostratigraphy
Carbonates
sedimentology
carbonate

Sulfur-cycling fossil bacteria from the 1.8-Ga Duck Creek Formation provide promising evidence of evolution's null hypothesis

Schopf, J. W., Kudryavtsev, A. B., Walter, M. R., Van Kranendonk, M. J., Williford, K. H., Kozdon, R., Valley, J. W., Gallardo, V. A., Espinoza, C. & Flannery, D. T., 17 Feb 2015, In : Proceedings of the National Academy of Sciences of the United States of America. 112, 7, p. 2087-2092 6 p.

Research output: Contribution to journalArticleResearchpeer-review

Biota
Ducks
Sulfur
Bacteria
Nitrates
2014

The ca 2.74 Ga Mopoke Member, Kylena Formation: a marine incursion into the northern Fortescue Group?

Flannery, D. T., Van Kranendonk, M. J., Mazumder, R. & Walter, M. R., 17 Nov 2014, In : Australian Journal of Earth Sciences. 61, 8, p. 1095-1108 14 p.

Research output: Contribution to journalArticleResearchpeer-review

stable isotope
sedimentology
carbon isotope
geochemistry
sedimentary feature
2013

Diversity of cyanobacterial biomarker genes from the stromatolites of Shark Bay, Western Australia

Garby, T. J., Walter, M. R., Larkum, A. W. D. & Neilan, B. A., May 2013, In : Environmental microbiology. 15, 5, p. 1464-1475 12 p.

Research output: Contribution to journalArticleResearchpeer-review

hopanoid
Sharks
Western Australia
Cyanobacteria
shark

Sedimentology, stratigraphy and geochemistry of a stromatolite biofacies in the 2.72 Ga Tumbiana Formation, Fortescue Group, Western Australia

Coffey, J. M., Flannery, D. T., Walter, M. R. & George, S. C., Oct 2013, In : Precambrian Research. 236, p. 282-296 15 p.

Research output: Contribution to journalArticleResearchpeer-review

Sedimentology
stromatolite
Stratigraphy
biofacies
Geochemistry
2012

Archean tufted microbial mats and the Great Oxidation Event: New insights into an ancient problem

Flannery, D. T. & Walter, M. R., Feb 2012, In : Australian Journal of Earth Sciences. 59, 1, p. 1-11 11 p.

Research output: Contribution to journalArticleResearchpeer-review

microbial mat
Archean
microbialite
oxidation
microfossil

Astrobiology outreach and the nature of science: The role of creativity

Fergusson, J., Oliver, C. & Walter, M. R., 1 Dec 2012, In : Astrobiology. 12, 12, p. 1143-1153 11 p.

Research output: Contribution to journalArticleResearchpeer-review

Exobiology
exobiology
outreach
Creativity
students

My life as an astrobiologist

Walter, M., Aug 2012, In : Astrobiology. 12, 8, p. 803-807 5 p.

Research output: Contribution to journalArticleResearchpeer-review

Oxygen-dependent morphogenesis of modern clumped photosynthetic mats and implications for the archean stromatolite record

Sim, M. S., Liang, B., Petroff, A. P., Evans, A., Klepac-Ceraj, V., Flannery, D. T., Walter, M. R. & Bosak, T., Dec 2012, In : Geosciences (Switzerland). 2, 4, p. 235-259 25 p.

Research output: Contribution to journalArticleResearchpeer-review

stromatolite
morphogenesis
Archean
oxygen
early Earth
2011

Molecular assessment of UVC radiation-induced DNA damage repair in the stromatolitic halophilic archaeon, Halococcus hamelinensis

Leuko, S., Neilan, B. A., Burns, B. P., Walter, M. R. & Rothschild, L. J., 7 Feb 2011, In : Journal of Photochemistry and Photobiology B: Biology. 102, 2, p. 140-145 6 p.

Research output: Contribution to journalArticleResearchpeer-review

Halococcus
Archaea
DNA Repair
genes
DNA Damage

The fluorescent dyes TO-PRO-3 and TOTO-3 iodide allow detection of microbial cells in soil samples without interference from background fluorescence

Henneberger, R., Birch, D., Bergquist, P., Walter, M. & Anitori, R. P., Sep 2011, In : BioTechniques. 51, 3, p. 190-192 3 p.

Research output: Contribution to journalArticleResearchpeer-review

Iodides
Fluorescent Dyes
Coloring Agents
Soil
Fluorescence
2010

Biogenicity of morphologically diverse carbonaceous microstructures from the ca. 3400 Ma strelley pool formation, in the pilbara craton, Western Australia

Sugitani, K., Lepot, K., Nagaoka, T., Mimura, K., Van Kranendonk, M., Oehler, D. Z. & Walter, M. R., 1 Nov 2010, In : Astrobiology. 10, 9, p. 899-920 22 p.

Research output: Contribution to journalArticleResearchpeer-review

Western Australia
microfossils
cratons
microfossil
microstructure

Diversity in the archean biosphere: New insights from nanoSIMS

Oehler, D. Z., Robert, F., Walter, M. R., Sugitani, K., Meibom, A., Mostefaoui, S. & Gibson, E. K., 1 May 2010, In : Astrobiology. 10, 4, p. 413-424 12 p.

Research output: Contribution to journalArticleResearchpeer-review

Secondary Ion Mass Spectrometry
biosphere
spindles
quartzite
microstructure

Geobiology of the late Paleoproterozoic Duck Creek Formation, Western Australia

Wilson, J. P., Fischer, W. W., Johnston, D. T., Knoll, A. H., Grotzinger, J. P., Walter, M. R., McNaughton, N. J., Simon, M., Abelson, J., Schrag, D. P., Summons, R., Allwood, A., Andres, M., Gammon, C., Garvin, J., Rashby, S., Schweizer, M. & Watters, W. A., May 2010, In : Precambrian Research. 179, 1-4, p. 135-149 15 p.

Research output: Contribution to journalArticleResearchpeer-review

Iron
Carbonates
iron
carbonate
Oxygen Isotopes

Precambrian microbe-like pseudofossils: A promising solution to the problem

Schopf, W. W., Kudryavtsev, A. B., Sugitani, K. & Walter, M. R., May 2010, In : Precambrian Research. 179, 1-4, p. 191-205 15 p.

Research output: Contribution to journalArticleResearchpeer-review

Precambrian
fossil
Calcium Carbonate
Geology
Optical microscopy

The geology of Australian Mars analogue sites

West, M. D., Clarke, J. D. A., Thomas, M., Pain, C. F. & Walter, M. R., Mar 2010, In : Planetary and Space Science. 58, 4, p. 447-458 12 p.

Research output: Contribution to journalArticleResearchpeer-review

geology
mars
Mars
analogs
landforms

Trace elements record depositional history of an Early Archean stromatolitic carbonate platform

Allwood, A. C., Kamber, B. S., Walter, M. R., Burch, I. W. & Kanik, I., 15 Feb 2010, In : Chemical Geology. 270, 1-4, p. 148-163 16 p.

Research output: Contribution to journalArticleResearchpeer-review

Carbonates
Trace Elements
carbonate platform
Archean
rare earth element
2009

Global protein-level responses of halobacterium salinarum NRC-1 to prolonged changes in external sodium chloride concentrations

Leuko, S., Raftery, M. J., Burns, B. P., Walter, M. R. & Neilan, B. A., 1 May 2009, In : Journal of Proteome Research. 8, 5, p. 2218-2225 8 p.

Research output: Contribution to journalArticleResearchpeer-review

Halobacterium salinarum
Sodium Chloride
Salinity
Growth
Proteins

Modern analogues and the early history of microbial life

Burns, B. P., Anitori, R., Butterworth, P., Henneberger, R., Goh, F., Allen, M. A., Ibañez-Peral, R., Bergquist, P. L., Walter, M. R. & Neilan, B. A., Sep 2009, In : Precambrian Research. 173, 1-4, p. 10-18 9 p.

Research output: Contribution to journalArticleResearchpeer-review

Volcanoes
Microorganisms
Genes
Cloning
Biodiversity

NanoSIMS: Insights to biogenicity and syngeneity of Archaean carbonaceous structures

Oehler, D. Z., Robert, F., Walter, M. R., Sugitani, K., Allwood, A., Meibom, A., Mostefaoui, S., Selo, M., Thomen, A. & Gibson, E. K., Sep 2009, In : Precambrian Research. 173, 1-4, p. 70-78 9 p.

Research output: Contribution to journalArticleResearchpeer-review

Archean
microfossil
Nitrogen
Carbon
Silicon Dioxide

Taxonomy and biogenicity of Archaean spheroidal microfossils (ca. 3.0 Ga) from the Mount Goldsworthy-Mount Grant area in the northeastern Pilbara Craton, Western Australia

Sugitani, K., Grey, K., Nagaoka, T., Mimura, K. & Walter, M. R., Sep 2009, In : Precambrian Research. 173, 1-4, p. 50-59 10 p.

Research output: Contribution to journalArticleResearchpeer-review

Taxonomies
microfossil
craton
Archean
microstructure
2008

Lysis efficiency of standard DNA extraction methods for Halococcus spp. in an organic rich environment

Leuko, S., Goh, F., Ibáñez-Peral, R., Burns, B. P., Walter, M. R. & Neilan, B. A., Mar 2008, In : Extremophiles. 12, 2, p. 301-308 8 p.

Research output: Contribution to journalArticleResearchpeer-review

Halococcus
Muramidase
DNA
Octoxynol
Buffers

Origin of Nama Basin bitumen seeps: petroleum derived from a Permian lacustrine source rock traversing southwestern Gondwana

Summons, R. E., Hope, J. M., Swart, R. & Walter, M. R., May 2008, In : Organic Geochemistry. 39, 5, p. 589-607 19 p.

Research output: Contribution to journalArticleResearchpeer-review

asphalt
Cholestanes
Quartz
Calcium Carbonate
Petroleum

Potential use of quantum dots in flow cytometry

Ibáñez-Peral, R., Bergquist, P. L., Walter, M. R., Gibbs, M., Goldys, E. M. & Ferrari, B., Dec 2008, In : International Journal of Molecular Sciences. 9, 12, p. 2622-2638 17 p.

Research output: Contribution to journalArticleResearchpeer-review

Quantum Dots
cytometry
Flow cytometry
Fluorescein-5-isothiocyanate
Flow measurement

Regional organic geochemistry of host sediments of Palaeoproterozoic McArthur River Ore deposit, Australia

MacKenzie, K. L., Marshall, C. P. & Walter, M. R., Jan 2008, In : Theoretical Chemistry Accounts. 119, 1-3, p. 143-153 11 p.

Research output: Contribution to journalArticleResearchpeer-review

Ore deposits
Geochemistry
geochemistry
rivers
Sediments

Stratigraphic relationships of Cryogenian strata disconformably overlying the Bitter Springs Formation, northeastern Amadeus Basin, Central Australia

Skotnicki, S. J., Hill, A. C., Walter, M. & Jenkins, R., 20 Sep 2008, In : Precambrian Research. 165, 3-4, p. 243-259 17 p.

Research output: Contribution to journalArticleResearchpeer-review

Carbonates
Sandstone
chert
Springs (water)
dolomite
2007

3.43 billion-year-old stromatolite reef from the Pilbara Craton of Western Australia: Ecosystem-scale insights to early life on Earth

Allwood, A. C., Walter, M. R., Burch, I. W. & Kamber, B. S., 5 Oct 2007, In : Precambrian Research. 158, 3-4, p. 198-227 30 p.

Research output: Contribution to journalArticleResearchpeer-review

stromatolite
Reefs
Ecosystems
craton
reef

Analysis of intergenic spacer region length polymorphisms to investigate the halophilic archaeal diversity of stromatolites and microbial mats

Leuko, S., Goh, F., Allen, M. A., Burns, B. P., Walter, M. R. & Neilan, B. A., Jan 2007, In : Extremophiles. 11, 1, p. 203-210 8 p.

Research output: Contribution to journalArticleResearchpeer-review

Intergenic DNA
Archaea
Western Australia
Ecosystem
Sequence Analysis

Carotenoid analysis of halophilic archaea by resonance Raman spectroscopy

Marshall, C. P., Leuko, S., Coyle, C. M., Walter, M. R., Burns, B. P. & Neilan, B. A., Aug 2007, In : Astrobiology. 7, 4, p. 631-643 13 p.

Research output: Contribution to journalArticleResearchpeer-review

Raman spectroscopy
carotenoids
Raman Spectrum Analysis
Archaea
Carotenoids

Diverse microstructures from Archaean chert from the Mount Goldsworthy-Mount Grant area, Pilbara Craton, Western Australia: Microfossils, dubiofossils, or pseudofossils?

Sugitani, K., Grey, K., Allwood, A., Nagaoka, T., Mimura, K., Minami, M., Marshall, C. P., Van Kranendonk, M. J. & Walter, M. R., 5 Oct 2007, In : Precambrian Research. 158, 3-4, p. 228-262 35 p.

Research output: Contribution to journalArticleResearchpeer-review

chert
microfossil
craton
Archean
microstructure

No heliotropism in Neoproterozoic columnar stromatolite growth, Amadeus Basin, central Australia: geophysical implications

Williams, G. E., Jenkins, R. J. F. & Walter, M. R., 11 Jun 2007, In : Palaeogeography, Palaeoclimatology, Palaeoecology. 249, 1-2, p. 80-89 10 p.

Research output: Contribution to journalArticleResearchpeer-review

heliotropism
stromatolite
dolomite
branching
basins

Structural characterization of kerogen in 3.4 Ga Archaean cherts from the Pilbara Craton, Western Australia

Marshall, C. P., Love, G. D., Snape, C. E., Hill, A. C., Allwood, A. C., Walter, M. R., Van Kranendonk, M. J., Bowden, S. A., Sylva, S. P. & Summons, R. E., 5 May 2007, In : Precambrian Research. 155, 1-2, p. 1-23 23 p.

Research output: Contribution to journalArticleResearchpeer-review

Kerogen
kerogen
craton
Archean
chert
2006

Extraction of DNA from acidic, hydrothermally modified volcanic soils

Henneberger, R. M., Walter, M. R. & Anitori, R. P., 2006, In : Environmental Chemistry. 3, 2, p. 100-104 5 p.

Research output: Contribution to journalArticleResearchpeer-review

volcanic soil
extremophile
Soils
DNA
Kitchens

Hydrothermal alteration at the Panorama Formation, North Pole Dome, Pilbara Craton, Western Australia

Brown, A. J., Cudahy, T. J. & Walter, M. R., 15 Dec 2006, In : Precambrian Research. 151, 3-4, p. 211-223 13 p.

Research output: Contribution to journalArticleResearchpeer-review

pyrophyllite
Domes
hydrothermal alteration
dome
Minerals

Raman spectroscopy reveals thermal palaeoenvironments of c.3.5 billion-year-old organic matter

Allwood, A. C., Walter, M. R. & Marshall, C. P., 30 Aug 2006, In : Vibrational Spectroscopy. 41, 2, p. 190-197 8 p.

Research output: Contribution to journalArticleResearchpeer-review

Biological materials
Raman spectroscopy
Carbon
Molecular structure
Raman scattering

Stromatolite reef from the Early Archaean era of Australia

Allwood, A. C., Walter, M. R., Kamber, B. S., Marshall, C. P. & Burch, I. W., 8 Jun 2006, In : Nature. 441, 7094, p. 714-718 5 p.

Research output: Contribution to journalArticleResearchpeer-review

Carbonates

The Ediacaran period: a new addition to the geologic time scale

Knoll, A. H., Walter, M. R., Narbonne, G. M. & Christie-Blick, N., Mar 2006, In : Lethaia. 39, 1, p. 13-30 18 p.

Research output: Contribution to journalArticleResearchpeer-review

Ediacaran
stratigraphy
South Australia
carbonates
timescale
2005

Combined micro-Fourier transform infrared (FTIR) spectroscopy and micro-Raman spectroscopy of Proterozoic acritarchs: a new approach to Palaeobiology

Marshall, C. P., Javaux, E. J., Knoll, A. H. & Walter, M. R., 9 Aug 2005, In : Precambrian Research. 138, 3-4, p. 208-224 17 p.

Research output: Contribution to journalArticleResearchpeer-review

paleobiology
Raman spectroscopy
FTIR spectroscopy
Stretching
Proterozoic

Hyperspectral imaging spectroscopy of a Mars analogue environment at the North Pole Dome, Pilbara Craton, Western Australia

Brown, A. J., Walter, M. R. & Cudahy, T. J., Jun 2005, In : Australian Journal of Earth Sciences. 52, 3, p. 353-364 12 p.

Research output: Contribution to journalArticleResearchpeer-review

hydrothermal alteration
dome
craton
Mars
spectroscopy

Textural preservation in siliceous hot spring deposits during early diagenesis: Examples from Yellowstone National Park and Nevada, U.S.A

Hinman, N. W. & Walter, M. R., Mar 2005, In : Journal of Sedimentary Research. 75, 2, p. 200-215 16 p.

Research output: Contribution to journalArticleResearchpeer-review

sinter
thermal spring
diagenesis
national park
microfacies
2004

Ground-based IR imaging spectroscopy of Mars

Bailey, J., Chamberlain, S., Walter, M. & Crisp, D., Mar 2004, In : European Space Agency, (Special Publication) ESA SP. 545, p. 7-10 4 p.

Research output: Contribution to journalArticleResearchpeer-review

Infrared imaging
Telescopes
mars
Mars
Adaptive optics

Near infrared spectra of the Martian surface

Chamberlain, S., Bailey, J., Walter, M. & Crisp, D., Mar 2004, In : European Space Agency, (Special Publication) ESA SP. 545, p. 181-182 2 p.

Research output: Contribution to journalArticleResearchpeer-review

infrared telescopes
United Kingdom
near infrared
infrared spectra
Infrared radiation

Recognizing the geological signature of early life on Earth and Mars

Javaux, E. J., Knoll, A. H., Marshall, C. P. & Walter, M. R., Mar 2004, In : European Space Agency, (Special Publication) ESA SP. 545, p. 127-130 4 p.

Research output: Contribution to journalArticleResearchpeer-review

mars
Mars
early Earth
Earth (planet)
signatures

Remote and in situ detection of environmental and biological signatures: Ground-truthing hyperspectral imaging for planetary exploration

Storrie-Lombardi, M. C., Brown, A. J. & Walter, M. R., 2004, In : Proceedings of SPIE - The International Society for Optical Engineering. 5555, p. 270-280 11 p., 28.

Research output: Contribution to journalArticleResearchpeer-review

Hyperspectral Imaging
Basalt
space exploration
fossils
basalt

Short-wave infrared reflectance investigation of sites of paleobiological interest: applications for Mars exploration

Brown, A., Walter, M. & Cudahy, T., Sep 2004, In : Astrobiology. 4, 3, p. 359-376 18 p.

Research output: Contribution to journalArticleResearchpeer-review

Radio Waves
Mars exploration
Mars
chert
reflectance

TEM evidence for eukaryotic diversity in mid-Proterozoic oceans

Javaux, E. J., Knoll, A. H. & Walter, M., Jul 2004, In : Geobiology. 2, 3, p. 121-132 12 p.

Research output: Contribution to journalArticleResearch

2003

Evidence for low sulphate and anoxia in a mid-Proterozoic marine basin

Shen, Y., Knoll, A. H. & Walter, M. R., 5 Jun 2003, In : Nature. 423, 6940, p. 632-635 4 p.

Research output: Contribution to journalArticleResearchpeer-review

Oceans and Seas
Sulfates
Iron
Water
Sulfur

Global Neoproterozoic (Sturtian) post-glacial sulfide-sulfur isotope anomaly recognised in Namibia

Gorjan, P., Walter, M. R. & Swart, R., Jan 2003, In : Journal of African Earth Sciences. 36, 1-2, p. 89-98 10 p.

Research output: Contribution to journalArticleResearchpeer-review

sulfur isotope
Postglacial
glaciation
sulfide
anomaly