Kenneth Edward Herkenhoff, Ph.D. (Former Employee)
Science and Products
Filter Total Items: 149
Chemical variations in Yellowknife Bay formation sedimentary rocks analyzed by ChemCam on board the Curiosity rover on Mars
The Yellowknife Bay formation represents a ~5 m thick stratigraphic section of lithified fluvial and lacustrine sediments analyzed by the Curiosity rover in Gale crater, Mars. Previous works have mainly focused on the mudstones that were drilled by the rover at two locations. The present study focuses on the sedimentary rocks stratigraphically above the mudstones by studying their chemical variati
Authors
Nicolas Mangold, Olivier Forni, G. Dromart, K.M. Stack, Roger C. Wiens, Olivier Gasnault, Dawn Y. Sumner, Marion Nachon, Pierre-Yves Meslin, Ryan B. Anderson, Bruce Barraclough, J.F. Bell, G. Berger, D.L. Blaney, J.C. Bridges, F. Calef, Brian R. Clark, Samuel M. Clegg, Agnès Cousin, L. Edgar, Kenneth S. Edgett, B.L. Ehlmann, Cecile Fabre, M. Fisk, John P. Grotzinger, S.C. Gupta, Kenneth E. Herkenhoff, J.A. Hurowitz, J. R. Johnson, Linda C. Kah, Nina L. Lanza, Jeremie Lasue, S. Le Mouélic, Eric Lewin, Michael Malin, Scott M. McLennan, S. Maurice, Noureddine Melikechi, Alissa Mezzacappa, Ralph E. Milliken, H.L. Newsome, A. Ollila, Scott K. Rowland, Violaine Sautter, M.E. Schmidt, S. Schroder, C. D'Uston, Dave Vaniman, R. A. Williams
Mars Reconnaissance Orbiter and Opportunity observations of the Burns formation: crater hopping at Meridiani Planum
Compact Reconnaissance Imaging Spectrometer for Mars hyperspectral (1.0–2.65 µm) along-track oversampled observations covering Victoria, Santa Maria, Endeavour, and Ada craters were processed to 6 m/pixel and used in combination with Opportunity observations to detect and map hydrated Mg and Ca sulfate minerals in the Burns formation. The strongest spectral absorption features were found to be ass
Authors
R.E. Arvidson, J.F. Bell, J.G. Catalano, B. C. Clark, V.K. Fox, Ralf Gellert, J.P. Grotzinger, E.A. Guinness, Kenneth E. Herkenhoff, A.H. Knoll, M.G.A. Lapotre, S. M. McLennan, D. W. Ming, R.V. Morris, S.L. Murchie, K. E. Powell, M. D. Smith, S. W. Squyres, M.J. Wolff, J.J. Wray
Context of ancient aqueous environments on Mars from in situ geologic mapping at Endeavour Crater
Using the Mars Exploration Rover Opportunity, we have compiled one of the first field geologic maps on Mars while traversing the Noachian terrain along the rim of the 22 km diameter Endeavour Crater (Latitude −2°16′33″, Longitude −5°10′51″). In situ mapping of the petrographic, elemental, structural, and stratigraphic characteristics of outcrops and rocks distinguishes four mappable bedrock lithol
Authors
L.S. Crumpler, R. E. Arvidson, J. Bell, B. C. Clark, B. A. Cohen, W. H. Farrand, Ralf Gellert, M. Golombek, J. A. Grant, E. Guinness, Kenneth E. Herkenhoff, J. R. Johnson, B. Jolliff, D. W. Ming, D. W. Mittlefehldt, T. Parker, J. W. Rice, S. W. Squyres, R. Sullivan, A. S. Yen
Evidence for outcrop-scale deformation band faults on Mars from Curiosity rover imagery
No abstract available.
Authors
Jonathan S. Caine, Ryan B. Anderson, Kenneth E. Herkenhoff, Glynis M. Parrett
Sands at Gusev Crater, Mars
Processes, environments, and the energy associated with the transport and deposition of sand at Gusev Crater are characterized at the microscopic scale through the comparison of statistical moments for particle size and shape distributions. Bivariate and factor analyses define distinct textural groups at 51 sites along the traverse completed by the Spirit rover as it crossed the plains and went in
Authors
Nathalie A. Cabrol, Kenneth E. Herkenhoff, Andrew H. Knoll, Jack D. Farmer, Raymond E. Arvidson, E.A. Grin, Ron Li, Lori Fenton, B. Cohen, J.F. Bell, R. Aileen Yingst
Thermal behavior and ice-table depth within the north polar erg of Mars
We fully resolve a long-standing thermal discrepancy concerning the north polar erg of Mars. Several recent studies have shown that the erg’s thermal properties are consistent with normal basaltic sand overlying shallow ground ice or ice-cemented sand. Our findings bolster that conclusion by thoroughly characterizing the thermal behavior of the erg, demonstrating that other likely forms of physica
Authors
Nathaniel E. Putzig, Michael T. Mellon, Kenneth E. Herkenhoff, Roger J. Phillips, Brian J. Davis, Kenneth J. Ewer, Lauren M. Bowers
Volatile and organic compositions of sedimentary rocks in Yellowknife Bay, Gale crater, Mars
H2O, CO2, SO2, O2, H2, H2S, HCl, chlorinated hydrocarbons, NO, and other trace gases were evolved during pyrolysis of two mudstone samples acquired by the Curiosity rover at Yellowknife Bay within Gale crater, Mars. H2O/OH-bearing phases included 2:1 phyllosilicate(s), bassanite, akaganeite, and amorphous materials. Thermal decomposition of carbonates and combustion of organic materials are candid
Authors
D. W. Ming, P.D. Archer, D.P. Glavin, J.L. Eigenbrode, H.B. Franz, B. Sutter, A.E. Brunner, J. C. Stern, C. Freissinet, A.C. McAdam, P.R. Mahaffy, M. Cabane, P. Coll, J.L. Campbell, S.K. Atreya, P.B. Niles, J.F. Bell, D.L. Bish, W.B. Brinckerhoff, A. Buch, P.G. Conrad, D.J. Des Marais, B.L. Ehlmann, A.G. Fairén, K. Farley, G.J. Flesch, P. Francois, Ralf Gellert, J. A. Grant, J.P. Grotzinger, S. Gupta, Kenneth E. Herkenhoff, J.A. Hurowitz, L.A. Leshin, K.W. Lewis, S. M. McLennan, Karl E. Miller, J. Moersch, R.V. Morris, R. Navarro- González, A.A. Pavlov, G.M. Perrett, I. Pradler, S. W. Squyres, Roger E. Summons, A. Steele, E.M. Stolper, D.Y. Sumner, C. Szopa, S. Teinturier, M.G. Trainer, A.H. Treiman, D. T. Vaniman, A.R. Vasavada, C.R. Webster, J.J. Wray, R.A. Yingst
Ancient aqueous environments at Endeavour crater, Mars
Opportunity has investigated in detail rocks on the rim of the Noachian age Endeavour crater, where orbital spectral reflectance signatures indicate the presence of Fe+3-rich smectites. The signatures are associated with fine-grained, layered rocks containing spherules of diagenetic or impact origin. The layered rocks are overlain by breccias, and both units are cut by calcium sulfate veins precip
Authors
R. E. Arvidson, S. W. Squyres, J.F. Bell, J.G. Catalano, B. C. Clark, L.S. Crumpler, P.A. de Souza, A.G. Fairén, W. H. Farrand, V.K. Fox, Ralf Gellert, A. Ghosh, M.P. Golombeck, J.P. Grotzinger, E.A. Guinness, Kenneth E. Herkenhoff, B.L. Jolliff, A.H. Knoll, R. Li, S. M. McLennan, D. W. Ming, D. W. Mittlefehldt, Johnnie N. Moore, R.V. Morris, S.L. Murchie, T. J. Parker, G. Paulsen, J.W. Rice, S. W. Ruff, M. D. Smith, M.J. Wolff
The rock abrasion record at Gale Crater: Mars Science Laboratory results from Bradbury Landing to Rocknest
Ventifacts, rocks abraded by wind-borne particles, are found in Gale Crater, Mars. In the eastward drive from “Bradbury Landing” to “Rocknest,” they account for about half of the float and outcrop seen by Curiosity's cameras. Many are faceted and exhibit abrasion textures found at a range of scales, from submillimeter lineations to centimeter-scale facets, scallops, flutes, and grooves. The drive
Authors
N.T. Bridges, F.J. Calef, B.W. Hallett, Kenneth E. Herkenhoff, N.L. Lanza, S. Le Mouélic, C.E. Newman, D.L. Blaney, M.A. de Pablo, G.A. Kocurek, Y. Langevin, K.W. Lewis, N. Mangold, S. Maurice, P.-Y. Meslin, P. Pinet, N.O. Renno, CM.S. Rice, M.E. Richardson, V. Sautter, R.S. Sletten, R. C. Wiens, R.A. Yingst
Segmenting images automatically for granulometry and sedimentology: a martian case study
In a companion work, we bridge the gap between mature segmentation software used in terrestrial sedimentology
and emergent planetary segmentation with an original algorithm optimized to segment
whole images from the Microscopic Imager (MI) of the Mars Exploration Rovers (MER). In this work,
we compare its semi-automated outcome with manual photoanalyses using unconsolidated sediment
at Gusev and M
Authors
Suniti Karunatillake, Scott M. McLennan, Kenneth E. Herkenhoff, Jonathan M. Husch, Craig Hardgrove, J.R. Skok
Martian fluvial conglomerates at Gale Crater
Observations by the Mars Science Laboratory Mast Camera (Mastcam) in Gale crater reveal isolated outcrops of cemented pebbles (2 to 40 millimeters in diameter) and sand grains with textures typical of fluvial sedimentary conglomerates. Rounded pebbles in the conglomerates indicate substantial fluvial abrasion. ChemCam emission spectra at one outcrop show a predominantly feldspathic composition, co
Authors
Rebecca M.E. Williams, J.P. Grotzinger, W. E. Dietrich, S. Gupta, D.Y. Sumner, R. C. Wiens, N. Mangold, M. C. Malin, K.S. Edgett, S. Maurice, O. Forni, O. Gasnault, A. Ollila, Horton E. Newsom, G. Dromart, M.C. Palucis, R.A. Yingst, Ryan Anderson, Kenneth E. Herkenhoff, S. Le Mouélic, W. Goetz, M.B. Madsen, A. Koefoed, J.K. Jensen, J.C. Bridges, S.P. Schwenzer, K.W. Lewis, K.M. Stack, D. Rubin, L.C. Kah, J.F. Bell, J.D. Farmer, R. Sullivan, T. Van Beek, D.L. Blaney, O. Pariser, R.G. Deen
Soil diversity and hydration as observed by ChemCam at Gale crater, Mars
The ChemCam instrument, which provides insight into martian soil chemistry at the submillimeter scale, identified two principal soil types along the Curiosity rover traverse: a fine-grained mafic type and a locally derived, coarse-grained felsic type. The mafic soil component is representative of widespread martian soils and is similar in composition to the martian dust. It possesses a ubiquitous
Authors
P.-Y. Meslin, O. Gasnault, O. Forni, S. Schroder, A. Cousin, G. Berger, S.M. Clegg, J. Lasue, S. Maurice, V. Sautter, S. Le Mouélic, R. C. Wiens, C. Fabre, W. Goetz, D.L. Bish, N. Mangold, B. Ehlmann, N. Lanza, A.-M. Harri, Ryan Anderson, E. Rampe, T.H. McConnochie, P. Pinet, D. Blaney, D. Archer, B. Barraclough, S. Bender, D. Blake, J.G. Blank, N. Bridges, B. C. Clark, L. DeFlores, D. Delapp, G. Dromart, M.D. Dyar, M. R. Fisk, B. Gondet, J. Grotzinger, Kenneth E. Herkenhoff, J. Johnson, J.-L. Lacour, Y. Langevin, L. Leshin, E. Lewin, M.B. Madsen, N. Melikechi, Alissa Mezzacappa, M.A. Mischna, J.E. Moores, H. Newsom, A. Ollila, N. Renno, J.B. Sirven, R. Tokar, M. de la Torre, L. d'Uston, D. Vaniman, A. Yingst
Science and Products
Filter Total Items: 149
Chemical variations in Yellowknife Bay formation sedimentary rocks analyzed by ChemCam on board the Curiosity rover on Mars
The Yellowknife Bay formation represents a ~5 m thick stratigraphic section of lithified fluvial and lacustrine sediments analyzed by the Curiosity rover in Gale crater, Mars. Previous works have mainly focused on the mudstones that were drilled by the rover at two locations. The present study focuses on the sedimentary rocks stratigraphically above the mudstones by studying their chemical variati
Authors
Nicolas Mangold, Olivier Forni, G. Dromart, K.M. Stack, Roger C. Wiens, Olivier Gasnault, Dawn Y. Sumner, Marion Nachon, Pierre-Yves Meslin, Ryan B. Anderson, Bruce Barraclough, J.F. Bell, G. Berger, D.L. Blaney, J.C. Bridges, F. Calef, Brian R. Clark, Samuel M. Clegg, Agnès Cousin, L. Edgar, Kenneth S. Edgett, B.L. Ehlmann, Cecile Fabre, M. Fisk, John P. Grotzinger, S.C. Gupta, Kenneth E. Herkenhoff, J.A. Hurowitz, J. R. Johnson, Linda C. Kah, Nina L. Lanza, Jeremie Lasue, S. Le Mouélic, Eric Lewin, Michael Malin, Scott M. McLennan, S. Maurice, Noureddine Melikechi, Alissa Mezzacappa, Ralph E. Milliken, H.L. Newsome, A. Ollila, Scott K. Rowland, Violaine Sautter, M.E. Schmidt, S. Schroder, C. D'Uston, Dave Vaniman, R. A. Williams
Mars Reconnaissance Orbiter and Opportunity observations of the Burns formation: crater hopping at Meridiani Planum
Compact Reconnaissance Imaging Spectrometer for Mars hyperspectral (1.0–2.65 µm) along-track oversampled observations covering Victoria, Santa Maria, Endeavour, and Ada craters were processed to 6 m/pixel and used in combination with Opportunity observations to detect and map hydrated Mg and Ca sulfate minerals in the Burns formation. The strongest spectral absorption features were found to be ass
Authors
R.E. Arvidson, J.F. Bell, J.G. Catalano, B. C. Clark, V.K. Fox, Ralf Gellert, J.P. Grotzinger, E.A. Guinness, Kenneth E. Herkenhoff, A.H. Knoll, M.G.A. Lapotre, S. M. McLennan, D. W. Ming, R.V. Morris, S.L. Murchie, K. E. Powell, M. D. Smith, S. W. Squyres, M.J. Wolff, J.J. Wray
Context of ancient aqueous environments on Mars from in situ geologic mapping at Endeavour Crater
Using the Mars Exploration Rover Opportunity, we have compiled one of the first field geologic maps on Mars while traversing the Noachian terrain along the rim of the 22 km diameter Endeavour Crater (Latitude −2°16′33″, Longitude −5°10′51″). In situ mapping of the petrographic, elemental, structural, and stratigraphic characteristics of outcrops and rocks distinguishes four mappable bedrock lithol
Authors
L.S. Crumpler, R. E. Arvidson, J. Bell, B. C. Clark, B. A. Cohen, W. H. Farrand, Ralf Gellert, M. Golombek, J. A. Grant, E. Guinness, Kenneth E. Herkenhoff, J. R. Johnson, B. Jolliff, D. W. Ming, D. W. Mittlefehldt, T. Parker, J. W. Rice, S. W. Squyres, R. Sullivan, A. S. Yen
Evidence for outcrop-scale deformation band faults on Mars from Curiosity rover imagery
No abstract available.
Authors
Jonathan S. Caine, Ryan B. Anderson, Kenneth E. Herkenhoff, Glynis M. Parrett
Sands at Gusev Crater, Mars
Processes, environments, and the energy associated with the transport and deposition of sand at Gusev Crater are characterized at the microscopic scale through the comparison of statistical moments for particle size and shape distributions. Bivariate and factor analyses define distinct textural groups at 51 sites along the traverse completed by the Spirit rover as it crossed the plains and went in
Authors
Nathalie A. Cabrol, Kenneth E. Herkenhoff, Andrew H. Knoll, Jack D. Farmer, Raymond E. Arvidson, E.A. Grin, Ron Li, Lori Fenton, B. Cohen, J.F. Bell, R. Aileen Yingst
Thermal behavior and ice-table depth within the north polar erg of Mars
We fully resolve a long-standing thermal discrepancy concerning the north polar erg of Mars. Several recent studies have shown that the erg’s thermal properties are consistent with normal basaltic sand overlying shallow ground ice or ice-cemented sand. Our findings bolster that conclusion by thoroughly characterizing the thermal behavior of the erg, demonstrating that other likely forms of physica
Authors
Nathaniel E. Putzig, Michael T. Mellon, Kenneth E. Herkenhoff, Roger J. Phillips, Brian J. Davis, Kenneth J. Ewer, Lauren M. Bowers
Volatile and organic compositions of sedimentary rocks in Yellowknife Bay, Gale crater, Mars
H2O, CO2, SO2, O2, H2, H2S, HCl, chlorinated hydrocarbons, NO, and other trace gases were evolved during pyrolysis of two mudstone samples acquired by the Curiosity rover at Yellowknife Bay within Gale crater, Mars. H2O/OH-bearing phases included 2:1 phyllosilicate(s), bassanite, akaganeite, and amorphous materials. Thermal decomposition of carbonates and combustion of organic materials are candid
Authors
D. W. Ming, P.D. Archer, D.P. Glavin, J.L. Eigenbrode, H.B. Franz, B. Sutter, A.E. Brunner, J. C. Stern, C. Freissinet, A.C. McAdam, P.R. Mahaffy, M. Cabane, P. Coll, J.L. Campbell, S.K. Atreya, P.B. Niles, J.F. Bell, D.L. Bish, W.B. Brinckerhoff, A. Buch, P.G. Conrad, D.J. Des Marais, B.L. Ehlmann, A.G. Fairén, K. Farley, G.J. Flesch, P. Francois, Ralf Gellert, J. A. Grant, J.P. Grotzinger, S. Gupta, Kenneth E. Herkenhoff, J.A. Hurowitz, L.A. Leshin, K.W. Lewis, S. M. McLennan, Karl E. Miller, J. Moersch, R.V. Morris, R. Navarro- González, A.A. Pavlov, G.M. Perrett, I. Pradler, S. W. Squyres, Roger E. Summons, A. Steele, E.M. Stolper, D.Y. Sumner, C. Szopa, S. Teinturier, M.G. Trainer, A.H. Treiman, D. T. Vaniman, A.R. Vasavada, C.R. Webster, J.J. Wray, R.A. Yingst
Ancient aqueous environments at Endeavour crater, Mars
Opportunity has investigated in detail rocks on the rim of the Noachian age Endeavour crater, where orbital spectral reflectance signatures indicate the presence of Fe+3-rich smectites. The signatures are associated with fine-grained, layered rocks containing spherules of diagenetic or impact origin. The layered rocks are overlain by breccias, and both units are cut by calcium sulfate veins precip
Authors
R. E. Arvidson, S. W. Squyres, J.F. Bell, J.G. Catalano, B. C. Clark, L.S. Crumpler, P.A. de Souza, A.G. Fairén, W. H. Farrand, V.K. Fox, Ralf Gellert, A. Ghosh, M.P. Golombeck, J.P. Grotzinger, E.A. Guinness, Kenneth E. Herkenhoff, B.L. Jolliff, A.H. Knoll, R. Li, S. M. McLennan, D. W. Ming, D. W. Mittlefehldt, Johnnie N. Moore, R.V. Morris, S.L. Murchie, T. J. Parker, G. Paulsen, J.W. Rice, S. W. Ruff, M. D. Smith, M.J. Wolff
The rock abrasion record at Gale Crater: Mars Science Laboratory results from Bradbury Landing to Rocknest
Ventifacts, rocks abraded by wind-borne particles, are found in Gale Crater, Mars. In the eastward drive from “Bradbury Landing” to “Rocknest,” they account for about half of the float and outcrop seen by Curiosity's cameras. Many are faceted and exhibit abrasion textures found at a range of scales, from submillimeter lineations to centimeter-scale facets, scallops, flutes, and grooves. The drive
Authors
N.T. Bridges, F.J. Calef, B.W. Hallett, Kenneth E. Herkenhoff, N.L. Lanza, S. Le Mouélic, C.E. Newman, D.L. Blaney, M.A. de Pablo, G.A. Kocurek, Y. Langevin, K.W. Lewis, N. Mangold, S. Maurice, P.-Y. Meslin, P. Pinet, N.O. Renno, CM.S. Rice, M.E. Richardson, V. Sautter, R.S. Sletten, R. C. Wiens, R.A. Yingst
Segmenting images automatically for granulometry and sedimentology: a martian case study
In a companion work, we bridge the gap between mature segmentation software used in terrestrial sedimentology
and emergent planetary segmentation with an original algorithm optimized to segment
whole images from the Microscopic Imager (MI) of the Mars Exploration Rovers (MER). In this work,
we compare its semi-automated outcome with manual photoanalyses using unconsolidated sediment
at Gusev and M
Authors
Suniti Karunatillake, Scott M. McLennan, Kenneth E. Herkenhoff, Jonathan M. Husch, Craig Hardgrove, J.R. Skok
Martian fluvial conglomerates at Gale Crater
Observations by the Mars Science Laboratory Mast Camera (Mastcam) in Gale crater reveal isolated outcrops of cemented pebbles (2 to 40 millimeters in diameter) and sand grains with textures typical of fluvial sedimentary conglomerates. Rounded pebbles in the conglomerates indicate substantial fluvial abrasion. ChemCam emission spectra at one outcrop show a predominantly feldspathic composition, co
Authors
Rebecca M.E. Williams, J.P. Grotzinger, W. E. Dietrich, S. Gupta, D.Y. Sumner, R. C. Wiens, N. Mangold, M. C. Malin, K.S. Edgett, S. Maurice, O. Forni, O. Gasnault, A. Ollila, Horton E. Newsom, G. Dromart, M.C. Palucis, R.A. Yingst, Ryan Anderson, Kenneth E. Herkenhoff, S. Le Mouélic, W. Goetz, M.B. Madsen, A. Koefoed, J.K. Jensen, J.C. Bridges, S.P. Schwenzer, K.W. Lewis, K.M. Stack, D. Rubin, L.C. Kah, J.F. Bell, J.D. Farmer, R. Sullivan, T. Van Beek, D.L. Blaney, O. Pariser, R.G. Deen
Soil diversity and hydration as observed by ChemCam at Gale crater, Mars
The ChemCam instrument, which provides insight into martian soil chemistry at the submillimeter scale, identified two principal soil types along the Curiosity rover traverse: a fine-grained mafic type and a locally derived, coarse-grained felsic type. The mafic soil component is representative of widespread martian soils and is similar in composition to the martian dust. It possesses a ubiquitous
Authors
P.-Y. Meslin, O. Gasnault, O. Forni, S. Schroder, A. Cousin, G. Berger, S.M. Clegg, J. Lasue, S. Maurice, V. Sautter, S. Le Mouélic, R. C. Wiens, C. Fabre, W. Goetz, D.L. Bish, N. Mangold, B. Ehlmann, N. Lanza, A.-M. Harri, Ryan Anderson, E. Rampe, T.H. McConnochie, P. Pinet, D. Blaney, D. Archer, B. Barraclough, S. Bender, D. Blake, J.G. Blank, N. Bridges, B. C. Clark, L. DeFlores, D. Delapp, G. Dromart, M.D. Dyar, M. R. Fisk, B. Gondet, J. Grotzinger, Kenneth E. Herkenhoff, J. Johnson, J.-L. Lacour, Y. Langevin, L. Leshin, E. Lewin, M.B. Madsen, N. Melikechi, Alissa Mezzacappa, M.A. Mischna, J.E. Moores, H. Newsom, A. Ollila, N. Renno, J.B. Sirven, R. Tokar, M. de la Torre, L. d'Uston, D. Vaniman, A. Yingst