Publications

In Press, 2016
Jagoutz, O., MacDonald, F.A. & Royden, L., In Press, 2016. Low-latitude arc-continent collision as a driver for global cooling. Proceedings of the National Academy of Sciences.
Bold, U., et al., In Press, 2016. Neoproterozoic stratigraphy of the Zavkhan terrane of Mongolia: The backbone for Cryogenian and early Ediacaran chemostratigraphic records. American Journal of Science.
2016
Crockford, P.W., et al., 2016. Triple oxygen and multiple sulfur isotope constraints on the evolution of the post-Marinoan sulfur cycle. Earth and Planetary Science Letters , 435 , pp. 74-83.
2015
Rooney, A.D., et al., 2015. A Cryogenian Chronology: Two long-lasting, synchronous Neoproterozoic Snowball Earth glaciations. Geology , 43 (5) , pp. 459-462.
Cohen, P.A., et al., 2015. Cryogenian Macroscopic Organic Warty Structures (MOWS) and the Rise of Macroscopic Algae. Palaios , 30 (3) , pp. 238-247.
Cox, G.M., et al., 2015. Kikiktat Volcanics of Arctic Alaska – Melting of harzburgitic sub-continental lithospheric mantle associated with the Franklin Large Igneous Province. Lithosphere , pp. L435-1.
Condon, D.J., et al., 2015. Accelerating Neoproterozoic Research through Scientific Drilling. Scientific Drilling , 19 , pp. 17-25.
Sperling, E.A., et al., 2015. The global record of iron geochemical data from Proterozoic through Paleozoic basins. Nature , 523 (7561) , pp. 451-454.
Strauss, J.V., et al., 2015. Litho-, chemo-, and tectono-stratigraphic evolution of the Neoproterozoic Callison Lake Formation: Linking the break-up of Rodinia to the Islay carbon isotope excursion. Amercian Journal of Science , 315 , pp. 881-944.
Sperling, E.A., et al., 2015. Oxygen, facies, and secular controls on the appearance of Cryogenian and Ediacaran body and trace fossils in the Mackenzie Mountains of northwestern Canada. Geological Society of America Bulletin , B31329-1.
Smith, E.F., et al., 2015. Integrated stratigraphic, geochemical, and paleontological late Ediacaran to early Cambrian records from southwestern Mongolia. Geological Society of America Bulletin , doi: 10.1130/B31248.1. smith_2015_gsab_cambrian_mongolia.pdf
Carbone, C.A., et al., 2015. New Ediacaran fossils from the uppermost Blueflower Formation, northwest Canada: disentangling biostratigraphy and paleoecology. Journal of Paleontology , 89 (2) , pp. 281-291. carbone_2015_jofp_sekwi.pdf
Cohen, P.A. & Macdonald, F.A., 2015. The Proterozoic Record of Eukaryotes. Paleobiology , DOI: 10.1017/pab.2015.25 , pp. 1-23. cohenmacdonald_2015_paleobiology_proteuks.pdf
Smith, E.F., et al., 2015. Tectonostratigraphic evolution of the c. 780–730 Ma Beck Spring Dolomite: Basin Formation in the core of Rodinia. Supercontinent Cycles Through Earth History. smith_beck_2015_gslsp.pdf
2014
Kunzmann, M., et al., 2014. The early Neoproterozoic Chandindu Formation of the Fifteenmile Group in the Ogilvie Mountains. Yukon Geological Survey , pp. 93-107.
Strauss, J.V., et al., 2014. Geological map of the Coal Creek Inlier, Ogilvie Mountains (NTS 116B/10-15 and 116C/9,16) (1:100,000 scale). Yukon Geological Survey.
MacDonald, F.A., et al., 2014. A newly identified Gondwanan terrane in the northern Appalachian Mountains: Implications for the Taconic orogeny and closure of the Iapetus Ocean. Geology , 42 (6) , pp. 539-542.Abstract

The Taconic and Salinic orogenies in the northern Appalachian
Mountains record the closure of the Iapetus Ocean, which separated
peri-Laurentian and peri-Gondwanan terranes in the early Paleozoic.
The Taconic orogeny in New England is commonly depicted as
an Ordovician collision between the peri-Laurentian Shelburne Falls
arc and the Laurentian margin, followed by Silurian accretion of peri-
Gondwanan terranes during the Salinic orogeny. New U-Pb zircon
geochronology demonstrates that the Shelburne Falls arc was instead
constructed on a Gondwanan-derived terrane preserved in the Moretown
Formation, which we refer to here as the Moretown terrane.
Metasedimentary rocks of the Moretown Formation were deposited
after 514 Ma and contain abundant ca. 535–650 Ma detrital zircon that
suggest a Gondwanan source. The Moretown Formation is bound to the
west by the peri-Laurentian Rowe belt, which contains detrital zircon
in early Paleozoic metasedimentary rocks that is indistinguishable in
age from zircon in Laurentian margin rift-drift successions. These data
reveal that the principal Iapetan suture in New England is between the
Rowe belt and Moretown terrane, more than 50 km farther west than
previously suspected. The Moretown terrane is structurally below and
west of volcanic and metasedimentary rocks of the Hawley Formation,
which contains Laurentian-derived detrital zircon, providing a link
between peri-Laurentian and peri-Gondwanan terranes. The Moretown
terrane and Hawley Formation were intruded by 475 Ma plutons
during peak activity in the Shelburne Falls arc. We propose that the
peri-Laurentian Rowe belt was subducted under the Moretown terrane
just prior to 475 Ma, when the trench gap was narrow enough
to deliver Laurentian detritus to the Hawley Formation. Interaction
between peri-Laurentian and peri-Gondwanan terranes by 475 Ma is
20 m.y. earlier than documented elsewhere and accounts for structural
relationships, Early Ordovician metamorphism and deformation, and
the subsequent closure of the peri-Laurentian Taconic seaway. In this
scenario, a rifted-arc system on the Gondwanan margin resulted in the
formation of multiple terranes, including the Moretown, that independently
crossed and closed the Iapetus Ocean in piecemeal fashion.

macdonald_moretown_geology_2014.pdf