SEPM2020 ISGC

FIELD TRIPS AT A GLANCE


Pre-Conference

Post-Conference


Pre-Conference


Field Trip 1: Contrasting Mesozoic Fluvial Systems of Utah $900 USD

Dates:        Wednesday April 22 – Saturday April 25 (4 Days)
Leaders:     Mike Blum, Amanda Owen and Adrian Hartley
Location:    Departs from Salt Lake City and returns to Flagstaff, AZ

This field trip will examine Mesozoic fluvial deposits across Eastern and Central Utah to illustrate differences in fluvial architecture from the bar to basin scale. The trip will explore three distinct types of fluvial systems, with different paleogeographic and tectonic settings, patterns of accommodation, sediment routing, and relations to sea-level change, including the Cretaceous Blackhawk Formation and Castlegate sandstone of the Book Cliffs, and the Triassic Chinle and Late Jurassic Morrison Formations in the Moab area and Capitol Reef National Park.

The trip will feature fantastic outcrops, as well as discussion of sedimentary facies and stratigraphic successions, and will explore a range of topics, including: planform types in sand-rich fluvial systems, reservoir connectivity, comparing bedrock valleys with structurally-confined and unconfined aggradational fluvial systems, source-to-sink changes in fluvial architecture and facies, fluvial response to sea-level change, and detrital-zircon U-Pb records of paleodrainage organization and sediment routing.


Field Trip 2: Chinle Formation (Upper Triassic) Paleosols and Paleoenvironments in Petrified Forest National Park, Arizona $550 USD

Dates:        Thursday April 23 – Friday April 24 (2 Days)
Leader:      Steve Driese, Stacy Atchley, Stephen Dworkin and Aislyn Trendell Barclay
Location:    Departs and returns to Flagstaff, AZ

This is a two-day field trip to examine spectacular outcrops of Upper Triassic paleosols and associated floodplain and channel deposits of the Chinle Formation. The Chinle rocks at the Petrified Forest National Park are world-famous for the abundance of fossil trees and colorful Badlands-style landscape. Ongoing studies by Baylor Geosciences faculty members have focused on interpreting the paleopedology, sequence-stratigraphy, and paleoclimatology recorded in these rocks. Critical questions posed relate to tracking unusual climate and paleontological events, resolving some vegetation questions, etc. One of the paleosols occurs right at the contact of a major paleontological extinction located within the Upper Triassic. Paleosols are mapped in detail using a time-slice approach to reconstruct Deep-Time Critical Zones. The paleosols not only serve as stratigraphic markers, but also help with interpreting environments of deposition and paleoclimate. Many of the paleosols greatly resemble USDA Vertisols, which are high clay content (> 30% fine clays) soils that experience seasonal cycles of shrinking and swelling related to either seasonal precipitation or seasonal soil-moisture deficits; other paleosols resemble USDA Entisols, Inceptisols, Alfisols and Aridisols. Different fluvial styles appear recorded in sandstone deposits, with effects of both climate changes and intermittent volcanism and tectonics as influences. This field trip will afford participants to see many examples pointing to the specific aspects posed below and should lead to stimulating discussions in the field and during the Congress.


Field Trip 3: Red rocks of Sedona: Day tour of late Paleozoic strata of the Mogollon Rim $250 USD

Date:          Friday April 24 (One Day)
Leaders:     Ryan Leary and Mike Smith
Location:    Departs and returns to Flagstaff, AZ

This one day field trip will explore spectacular exposures of Pennsylvanian and Permian strata exposed in and around the community of Sedona, Arizona. These strata include cyclic clastic units of the Supai Group, fluvial strata of Hermit Formation, and spectacular aeolianites of the Schnebly Hill Formation and Coconino Sandstone. The field trip will leave from Flagstaff, and spend a full day visiting key outcrops and discussing local depositional environments, regional tectonism, and continent-scale sediment routing.


Field Trip 4: Aeolian Sedimentary Structures, from wind ripples to compound dunes $250 USD

Date:         Saturday April 25 (One Day)
Leader:      Dave Rubin
Location:    Departs and returns to Flagstaff, AZ

This full-day filed trip takes us to two outcrops in Glen Canyon National Recreation Area 2.5 hours north of Flagstaff. The outcrops display outstanding examples of aeolian sedimentary structures, from classical fine structures (preserved wind ripples and grain flows) to the four more complex structures in the accompanying photograph: cyclic cross-stratification deposited by dunes in seasonally reversing winds (upper left), compound cross-bedding deposited by superimposed dunes migrating over a large oblique dune (upper right), sets of wind ripples that repeatedly reversed migration (lower left), and interfingering sets of cross-beds deposited by zigzagging scour pits (lower right). We will use these examples to discuss how to distinguish compound cross-bedding deposited by two processes: fluctuating flows and migration of superimposed bedforms.


Post-Conference



Field Trip 5: The Mural Limestone of Arizona: Depositional Facies and Cyclicity in a Peak Greenhouse Ramp Interior Setting and Implications for Reservoir Characterization $780 USD

Dates:        Thursday April 30 – Friday May 1 (2  Days)
Leaders:    Rachel Aisner Williams and Kelly Hattori
Location:   Departs from Flagstaff, AZ and returns to Bisbee, AZ

This two-day field trip will feature a number of spectacular mid-Cretaceous carbonate ramp interior outcrops from the Mural Limestone near Bisbee, AZ, sure to keep any paleontologist or carbonate stratigrapher happy! Participants will visit a selection of key outcrops that illustrate common depositional successions and stratal architectures in this northernmost embayment of the Gulf of Mexico during a time of maximum marine transgression.


Day 1: Grassy Hill Ramp Interior


Day 2: Paul Spur Patch Reef

Discussions about differences in reef architecture based on paleoecological composition, and environmental and stratigraphic drivers of reef evolution and major faunal turnover


Field Trip 6: Southern California Turbidite Depositional Environments $2,275 USD

Dates:        Thursday April 30 - Sunday May 3 (4 Days)
Leader:      Zane Jobe
Location:   Departs and returns to San Diego, CA

This 4 day trip will visit classic, must-see locales as well as newly described locales along the southern California coast, including:

•    Submarine canyon strata at Black's Beach (Scripps and Ardath formations)
•    Submarine channel strata at San Clemente (Capistrano Formation)
•    Submarine lobe strata along the Point Loma peninsula (Point Loma Formation)


Many of these outcrops have been extensively studied since the 1960s and represent classic, must-see locales. However, many of these outcrops are undergoing a renaissance, with new insights being developed that utilize the knowledge derived from modern seafloor studies and detailed, quantitative outcrop analysis. In southern California, the present really is the key to the past, with modern depositional environments providing an 'analogy by proximity' to the ancient deepwater strata that outcrop along coastal sea cliffs. This trip will be led by Zane Jobe, but undoubtedly many trip participants will have deep knowledge of many of these outcrops, and we anticipate lively discussion.


Field Trip 7: A River Cuts through it; Grand Canyon Stratigraphy  CANCELLED

Dates:        Thursday April 30 - Sunday May 10 (10 Days)
Leader:      Gary Gianniny
Location:    Departs and returns to Flagstaff, AZ

A ten day motorized boat trip down the Colorado River experiencing all of the Grand Canyon’s geological splendor.   This trip focuses on the Neoproterozoic and Paleozoic carbonate and clastic sequences of the Southern Colorado Plateau as exposed along the Colorado River in the Grand Canyon. It also features exquisite outcrops of the Proterozoic metamorphic and igneous rocks of the inner gorge, and well exposed Neoproterozoic sediments of the Grand Canyon Super Group. These exceptional exposures provide robust analogs to many sedimentological and stratigraphic problems known only from the subsurface. Attendees will traverse the length of Grand Canyon National Park via a motorized raft which will serve as the base for short hikes to see the wide variety of geology exposed along the river.