Cenozoic Stratigraphy and Paleoceanography of Biserial Planktonic Foraminifers, Ontong Java Plateau

Resig, Johanna M.

doi:10.2973/odp.proc.sr.130.014.1993

Cited by 10 publications

(7 citation statements)

References 34 publications

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“…The presence of Streptochilus latus in sample Mf11682 and the Hart Mine Wash section indicates a late Miocene age between 8.1 and 5.3 Ma (Resig, 1989(Resig, , 1993. This age is confi rmed by the occurrence of Streptochilus cf.…”

Section: Age and Correlationmentioning

confidence: 77%

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Evidence for a marine incursion along the lower Colorado River corridor

McDougall

Martínez

2014

Geosphere

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Foraminiferal assemblages in the stratigraphically lower part of the Bouse Formation in the Blythe basin (lower Colorado River corridor, western USA) indicate marine conditions, whereas assemblages in the upper part of the Bouse Formation indicate lacustrine conditions and suggest the presence of a saline lake. Benthic foraminiferal assemblages in the lower part of the Bouse Formation are similar to lagoonal and inner neritic biofacies of the modern Gulf of California. Evidence suggesting a change from marine to lacustrine conditions includes the highest occurrence of planktic foraminifers at an elevation of 123 m above sea level (asl), the change from low diversity to monospecifi c foraminiferal assemblages composed only of Ammonia beccarii (between 110 and 126 m asl), an increase in abundance of A. beccarii specimens (above ~110 m asl), increased number of deformed tests (above ~123 m asl), fi rst appearance of Chara (at ~85 m asl), lowest occurrence of reworked Cretaceous coccoliths (at ~110 m), a decrease in strontium isotopic values (between 70 and 120 m), and δ 18 O and δ 13 C values similar to seawater (between 70 and 100 m asl). Planktic foraminifers indicate a late Miocene age between 8.1 and 5.3 Ma for the oldest part of the Bouse Formation in the southern part of the Blythe basin. Benthic and planktic foraminifers correlate with other late Miocene sections in the proto-Gulf of California and suggest that the basal Bouse Formation in the Blythe basin was deposited at the northern end of this proto-gulf. After the marine connection was restricted or eliminated, the Colorado River fl owed into the Blythe basin, forming a saline lake. This lake supported a monospecifi c foraminiferal assemblage of A. beccarii until the lake spilled into the Salton Trough and the Colorado River became a through-fl owing river.

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Section: Age and Correlationmentioning

confidence: 77%

“…A complete and well-preserved fossil record in the western Pacifi c and Indian Ocean has allowed recognition of the biostratigraphic relevance of this genus (Resig, 1989(Resig, , 1993.…”

Section: Paleontologymentioning

confidence: 99%

Evidence for a marine incursion along the lower Colorado River corridor

McDougall

Martínez

2014

Geosphere

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“…Therefore, we hypothesize that El Niño-like conditions over long timescales (or El Padre [Ravelo et al, 2014] conditions) caused the overall thermocline deepening and east to west gradient decrease, which well explains the southward isotopic shift from 27.6 to 27.4 Ma in the eastern equatorial Pacific. On the other hand, Resig [1993] found that biserial planktic foraminifers (high-productivity indicator) are rare or absent from the late Oligocene to early Miocene (~28 to 10 Ma) and suggested depressed thermocline during the interval at Site 807 in the western equatorial Pacific. Concomitant thermocline deepening in the eastern and western equatorial Pacific is consistent with the findings of Ford et al [2015] which proposed a basin-wide thermocline deepening during the Pliocene El Padre.…”

Section: 1002/2016pa002950mentioning

confidence: 99%

Changes in the depth habitat of the Oligocene planktic foraminifera (Dentoglobigerina venezuelana) induced by thermocline deepening in the eastern equatorial Pacific

et al. 2016

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Understanding planktic foraminiferal depth habitat along with consistent taxonomic concepts is key to accurate reconstruction of paleoceanographic records. The Oligocene‐Pliocene long‐ranging and widely distributed species Dentoglobigerina venezuelana lived in the mixed layer (shallower) during the early Oligocene, whereas the same species calcified at thermocline or subthermocline depths (deeper) during the late Oligocene and Miocene. The exact timing of the species' depth habitat change and its possible relationships with Oligocene climate dynamics remain unknown. Here we reveal isotopic records of D. venezuelana along with the Paragloborotalia siakensis group (a mixed‐layer dweller) by using sediments at Integrated Ocean Drilling Program Site U1334 in the eastern equatorial Pacific throughout the Oligocene. A two‐step depth habitat change of D. venezuelana is apparent: (1) from upper to lower mixed layer (~27.4 Ma) and (2) from lower mixed layer to thermocline depth (~26.3 Ma). In addition, the planktic foraminiferal faunal assemblage experienced a marked change from dominantly thermocline (deeper) species to abundant mixed‐layer (shallower) species, suggesting that depth habitat shifts of D. venezuelana were clearly related to thermocline deepening in the eastern equatorial Pacific. Comparison of the first isotopic shift (~27.4 Ma) at multiple sites (U1334, U1333, and 1218) revealed a southward depth habitat change of D. venezuelana within ~200 kyr, implying overall thermocline deepening with reduced steepness in the eastern equatorial Pacific. We consider that global warming conditions during the late Oligocene likely caused thermocline deepening with upwelling decrease in the eastern equatorial Pacific, guiding D. venezuelana to adapt to greater depths in the water column.

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“…Amphistegina gibbosa became extinct in the northern Gulf and Salton Trough region at approximately 5.3 Ma (Ingle, 1974;McDougall et al, 1999;Dorsey et al, 2007Dorsey et al, , 2011. The first occurrence of T. anfracta is 5.8 Ma, the range of S. globigerus in the equatorial Pacific is 5.45 to 3.6 Ma, and the range of G. multiloba is Miocene to Pliocene (Blow, 1979;Resig, 1989Resig, , 1993Miranda-Martínez et al, 2017;A.Y.Miranda-Martínez, personal communication, 2017). The highest occurrence of S. globigerus in this section is slightly below the highest occurrence of Globoturborotalita decoraperta, which has a LOD in the western equatorial Pacific at 2.2 Ma (Chaisson and Leckie, 1993).…”

Section: Micropaleontology and Biostratigraphymentioning

confidence: 99%

“…Globorotalia lenguaensis suggests an age no younger than 6.0 Ma, the time when this species became extinct in the Equatorial Pacific Ocean (Wade et al, 2011). The last occurrence datum (LOD) of Streptochilus latus (range: 8.1 to 5.3Ma in the Equatorial Pacific Ocean; Resig, 1989Resig, , 1993 and S. mcdougallae (local range: 6.0 to 5.3 Ma in the Gulf of California; Miranda-Martínez et al, 2017) occurs in the basal part of the green claystone and therefore indicates an age no younger than 5.3 Ma. Detrital sanidine from the DCL in Hart Mine Wash, stratigraphically below the LODs of planktic foraminifers listed above, yielded one 40Ar-39Ar age of 5.0 ± 0.4 Ma (Crow et al, 2016;pers.…”

Section: Cibola Areamentioning

confidence: 99%

Punctuated Sediment Discharge during Early Pliocene Birth of the Colorado River: Evidence from Regional Stratigraphy, Sedimentology, and Paleontology

Dorsey

O’Connell

McDougall

et al. 2018

Sedimentary Geology

114

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The Colorado River in the southwestern U.S. provides an excellent natural laboratory for studying the origins of a continent-scale river system, because deposits that formed prior to and during river initiation are well exposed in the lower river valley and nearby basinal sink. This paper presents a synthesis of regional stratigraphy, sedimentology, and micropaleontology from the southern Bouse Formation and similar-age deposits in the western Salton Trough, which we use to interpret processes that controlled the birth and early evolution of the Colorado River. The southern Bouse Formation is divided into three laterally persistent members: basal carbonate, siliciclastic, and upper bioclastic members. Basal carbonate accumulated in a tidedominated marine embayment during a rise of relative sea level between ~6.3 and 5.4 Ma, prior to arrival of the Colorado River. The transition to green claystone records initial rapid influx of river water and its distal clay wash load into the subtidal marine embayment at ~5.4-5.3 Ma. This was followed by rapid southward progradation of the Colorado River delta, establishment of the earliest through-flowing river, and deposition of river-derived turbidites in the western Salton Trough (Wind Caves paleocanyon) between ~5.3 and 5.1 Ma. Early delta progradation was followed by regional shut-down of river sand output between ~5.1 and 4.8 Ma that resulted in deposition of marine clay in the Salton Trough, retreat of the delta, and re-flooding of the lower river valley by shallow marine water that deposited the Bouse upper bioclastic member. Resumption of sediment discharge at ~4.8 Ma drove massive progradation of fluvial-deltaic deposits back down the river valley into the northern Gulf and Salton Trough.These results provide evidence for a discontinuous, start-stop-start history of sand output during initiation of the Colorado River that is not predicted by existing models for this system. The underlying controls on punctuated sediment discharge are assessed by comparing the depositional chronology to the record of global sea-level change. The lower Colorado River Valley and Salton Trough experienced marine transgression during a gradual fall in global sea level between ~6.3 and 5.5 Ma, implicating tectonic subsidence as the main driver of latest Miocene relative sea-level rise. A major fall of global sea level at 5.3Ma outpaced subsidence and drove regional delta progradation, earliest flushing of Colorado River sand into the northern Gulf of California, and erosion of Bouse basal carbonate and siliciclastic members. The lower Colorado River valley was re-flooded by shallow marine waters during smaller changes in global sea level ~ 5.1-4.8 Ma, after the river first ran through it, which requires a mechanism to stop delivery of sand to the lower river valley. We propose that tectonically controlled subsidence along the lower Colorado River, upstream of the southern Bouse study area, temporarily trapped sediment and stopped delivery of sand to the lower river valley and nort...

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Cenozoic Stratigraphy and Paleoceanography of Biserial Planktonic Foraminifers, Ontong Java Plateau

Cited by 10 publications

References 34 publications

Evidence for a marine incursion along the lower Colorado River corridor

Evidence for a marine incursion along the lower Colorado River corridor

Changes in the depth habitat of the Oligocene planktic foraminifera (Dentoglobigerina venezuelana) induced by thermocline deepening in the eastern equatorial Pacific

Punctuated Sediment Discharge during Early Pliocene Birth of the Colorado River: Evidence from Regional Stratigraphy, Sedimentology, and Paleontology

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