SEPM2020 ISGC

FIELD TRIPS AT A GLANCE


Pre-Conference

Post-Conference


Pre-Conference


Field Trip 1: Contrasting Mesozoic Fluvial Systems of Utah

Dates:        Tuesday April 21 – Friday April 24 (4 Days)
Leaders:     Mike Blum and Amanda Owen
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

Dates:        Thursday April 23 – Friday April 24 (2 Days)
Leader:      Steve Driese
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

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

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

This 1-day field trips takes participants to two stops that illustrate outstanding examples of Aeolian sedimentary structures, from the smallest fine structures (wind ripples, grainfall, and grainflow stratification) to larger assemblages of compound cross-bedding deposited by small dunes migrating over larger dunes. The outcrops also contain less common structures including cyclic cross-bedding produced by seasonally reversing winds, replaced evaporites, small dinosaur burrows, deformational structures, and fluid-escape structures. One of the stops visits a world-class slot canyon. The next 3 pages detail which structures occur at the 2 outcrops.


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

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

Improve understanding of depositional processes, facies architecture and environmental factors associated with circum-Gulf of Mexico carbonate development in a ramp interior setting using outcrop analogs.


Field Trip 6: Southern California Turbidite Depositional Environments

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 

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.