Indiana Dunes National Park: Geologic resources inventory report

Thornberry-Ehrlich, Trista

doi:10.36967/nrr-2279904

Cited by 2 publications

(3 citation statements)

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“…It is ombrotrophic, that is, purely rainfed with no surface inflows (McPherson, 1974; Shoemaker et al, 2011). Our focus is the western area, which sits on the Late Miocene Tamiami formation, a 45 m deep layer of limestone cobbles mixed with sandstone, mud, and clay (McPherson, 1974; Thornberry‐Ehrlich, 2008). The region has a humid subtropical climate with a pronounced wet season occurring from April to October (Shoemaker et al, 2011) and a mean annual precipitation of 1,330 mm (McPherson, 1974), matched by a mean potential evapotranspiration of almost 1,150 mm (Shoemaker et al, 2011) that is also strongly seasonal.…”

Section: Study Site and Experimental Descriptionmentioning

confidence: 99%

Local Storage Dynamics of Individual Wetlands Predict Wetlandscape Discharge

Klammler

Quintero

Jawitz

et al. 2020

Water Resources Research

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Wetlands provide valuable hydrological, ecological, and biogeochemical functions, both alone and in combination with other elements comprising the wetlandscape. Understanding the processes and mechanisms that drive wetlandscape functions, as well as their sensitivity to natural and man-made alterations, requires a sound physical understanding of wetland hydrodynamics. Here, we develop and apply a single reservoir hydrologic model to a low-relief karst wetlandscape in southwest Florida (≈10 3 km 2 of Big Cypress National Preserve) using precipitation P and potential evapotranspiration PET as climatic drivers. This simple approach captures the dynamics of storage for individual wetlands across the entire wetlandscape and accurately predicts landscape discharge. Key model insights are the importance of depth-dependent extinction of evapotranspiration ET and the negligible effects of depth-dependent specific yield, the effects of which are diluted by landscape relief. We identify three phases of the wetlandscape hydrological regime: dry, wet-stagnant, and wet-flowing. The model allowed a simple steady-state analysis, which demonstrated the sudden seasonal shift between wet-stagnant and wet-flowing states, indicating a consistent threshold at P ≈ PET. Notably, stage data from any single wetland appears sufficient for accurate whole-landscape discharge prediction because of the relative homogeneity in timing and duration of local wetland hydrologic connectivity in this landscape. We also show that this method will be transferable to other wetlandscapes, where individual storage elements respond hydrologically synchronously, whereas model performance is expected to deteriorate for hydrologically more heterogeneous wetlandscapes.

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Section: Study Site and Experimental Descriptionmentioning

confidence: 99%

Local Storage Dynamics of Individual Wetlands Predict Wetlandscape Discharge

Klammler

Quintero

Jawitz

et al. 2020

Water Resources Research

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“…Surface geography of the valley is diverse in igneous formations and intrusions [107][108][109][110][111]113,117,[122][123][124] Igneous rock types, from hornblende andesites, basaltic lapilli, cinders, and bombs to diabase and rhyolite outcrops, have been recorded in the valley over the past several decades [115,119,125]; however, most are only generally described and not mapped in geological detail [113,117,125,126]. Despite this, several specific rhyolite outcrops are known within the Alaska Range including in the headwaters of Eva Creek, on Sugarloaf Mountain, and inside Denali National Park and Preserve (DENA) [107][108][109][110][111]113,120,123,127].…”

Section: The Nenana River Valley and Its Geologymentioning

confidence: 99%

“…Survey of 42 river and creek drainages for materials available in alluvium deposits found the primary rock types in these drainages to be low-quality, non-knappable rocks including schist, schistose, quartz, and quartzites (Supplementary Table S1). Geologists previously mapped rhyolite at several localities in the Nenana valley, including in the Cantwell Formation in the vicinity of Riley Creek and the road entrance into DENA and in the foothills east of the river near the village of Ferry at the headwaters of Eva Creek [17,118,127,164]. During survey, seven outcrops of rhyolite were identified and sampled from these mapped locations (Figure 1).…”

Section: Raw Materials Surveymentioning

confidence: 99%

Characterizing Archaeological Rhyolites in the Nenana Valley, Interior Alaska

Gore,

Graf,

Lynch

2023

Minerals

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Portable X-ray fluorescence (pXRF) is a useful geochemical technique employed to explore toolstone procurement strategies in the lithic record, commonly utilized in sourcing obsidians. Non-obsidian volcanic toolstones (e.g., dacites, rhyolites, basalts, and andesites) are abundant in interior Alaskan assemblages yet understudied compared to obsidian. Geochemical analyses of these non-obsidian materials offer the potential to gain new insights into ancient toolstone provisioning behaviors. This paper presents a synthesis of geochemical (pXRF) analyses of rhyolite artifacts, systematic regional raw material surveys, and lithic technological analyses collected from nineteen late Pleistocene and Holocene assemblages from the Nenana valley, interior Alaska. Previous research studies on archaeological rhyolites from the region are replicated, new rhyolite artifact groups are identified, and one new rhyolite source is reported and described here. Ultimately, this paper contributes to a growing body of geochemical research seeking to provide a more nuanced look at the complex late Pleistocene and Holocene record of eastern Beringia.

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Indiana Dunes National Park: Geologic resources inventory report

Cited by 2 publications

References 0 publications

Local Storage Dynamics of Individual Wetlands Predict Wetlandscape Discharge

Local Storage Dynamics of Individual Wetlands Predict Wetlandscape Discharge

Characterizing Archaeological Rhyolites in the Nenana Valley, Interior Alaska

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