Markes Johnson

Dr. Markes Johnson

Geosciences Department, Williams College
orcid

Research Focus & Metrics

Academic Career Length

50Years (1977-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 May 2014 in Earth-Science Reviews
Verified
Journal Article
Closed access
KPKevin Pedoja
Kevin Pedoja
LHLaurent Husson
Laurent Husson
Markes JohnsonMarkes Johnson
Markes Johnson
DMDaniel Melnick
Daniel Melnick
CWCesar Witt
Cesar Witt
FGFranck Garestier
Franck Garestier

1 September 2011 in Earth-Science Reviews
Verified
Journal Article
Closed access
KPKevin Pedoja
Kevin Pedoja
LHLaurent Husson
Laurent Husson
VRVincent Regard
Vincent Regard
PCPeter Robert Cobbold
Peter Robert Cobbold
EOEmilie Ostanciaux
Emilie Ostanciaux
BDBernard Delcaillau
Bernard Delcaillau

1 June 2006 in GFF
Verified
Journal Article
Closed access
Markes JohnsonMarkes Johnson
Markes Johnson
Eight distinct highstands in sea level emerged from the author's study of the Silurian System on a continent-to-continent basis during the 1980s and 1990s. Some emendations are needed to accommodate other trends recognized since that time, but the overall pattern is strong. Five major highstands and one minor highstand fit the Lower Silurian (Llandovery and Wenlock series). Three major highstands fit the Upper Silurian (Ludlow and Přídolí series). Three separate episodes of glaciation correspond to drops in sea level from the Lower Silurian but fluctuations recorded in the Upper Silurian have no clear cause. Many oceanic events share common trends when the relationship with sea-level fluctuations is tested against a tight biostratigraphic framework. The Sandvika Event correlates with a sea-level drop between the second and third highstands from the Llandovery Series. An unnamed secundo-primo event overlaps the fall between the third and fourth highstands. The Ireviken Event corresponds to a drop near the basal Wenlock. The Boge Event matches a minor draw down superimposed on the fifth rise from the Sheinwoodian Stage. The Mulde Event partly fits a drop in the Lower Homerian Stage. The Linde Event corresponds to the low between the sixth and seventh peaks from the Ludlow Series and the Klev Event fits the lowstand between the seventh and eighth peaks near the Ludlow-Přídolí boundary. The Lau Event, however, appears to adjoin the seventh highstand. No known event corresponds to the draw down between the first and second sea-level peaks recorded in the Llandovery Series.

1 June 1977 in Tectonophysics
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Journal Article
Closed access
AZA.M. Ziegler
A.M. Ziegler
KHK.S. Hansen
K.S. Hansen
Markes JohnsonMarkes Johnson
Markes Johnson
MKM.A. Kelly
M.A. Kelly
CSC.R. Scotese
C.R. Scotese
RVR. Van Der Voo
R. Van Der Voo

1 July 1988 in The Journal of Geology
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Journal Article
Closed access
Markes JohnsonMarkes Johnson
Markes Johnson

1 October 2010 in Palaeogeography, Palaeoclimatology, Palaeoecology
Verified
Journal Article
Closed access
Markes JohnsonMarkes Johnson
Markes Johnson