Deciphering the origin of allochthonous sandstone boulder trains within a mudstone escarpment, Stołowe Mountains, SW Poland

Parzóch, Krzysztof; Migoń, Piotr

doi:10.1127/zfg_suppl/2015/s-00176

Cited by 7 publications

(9 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The rock fragment (Fig. 2, b) can be interpreted as a residual part of bedrock (a block of mudstone or sandstone?, residuum of the 1 st morphostructural level?, almost completely eroded and visible on Mt RK hilltop only as scattered sandstone boulders, see discussion in Parzóch et al 2009, andParzóch andMigoń, 2015). Within the slope cross-section thicker and wetter parts are also clearly distinguishable (e.g.…”

Section: Main Geoelectrical Features Of Bedrockmentioning

confidence: 85%

See 1 more Smart Citation

Electrical resistivity tomography (ERT) of pit-and-mound microrelief, Mt Rogowa Kopa case study, the Stołowe Mountains, SW Poland

Pawlik¹,

Kasprzak²

2015

Landform Analysis

View full text Add to dashboard Cite

This article presents results of geophysical analyses based on electrical imaging of slope mantles with pit-and-mound microtopography developed on the Rogowa Kopa hillslope in the Stołowe Mountains, SW Poland. The use of two dimensional electrical resistivity tomography (2D ERT) to non-invasive analyses of the hillslope microrelief allowed completing previous results of geomorphological and soil studies. The tomograms (inversion results) acquired across individual forms of treethrow pits and mounds can be interpreted according to regolith thickness and its wetness, but also smaller features such as relict and fresh tree root systems detected in the mounds. These features were compared to a general picture of geoelectrical resistivity measured in the main cross-section of the analyzed hillslope. The differences in slope cover characteristics observed on the tomograms confirm important role of the tree uprooting process in formation of some basic features of the regolith and soils, including their uneven redistribution across the hillslope.

show abstract

Section: Main Geoelectrical Features Of Bedrockmentioning

confidence: 85%

“…The area is under strict environmental protection within the Stołowe Mountains National Park. Mt RK consists of two clearly contrasting relief components: a flat deforested mountain top with residual sandstone blocks (Sawanna Łężycka), steep (up to 35° of slope inclination) forested hillslopes (Parzóch, Migoń 2015).…”

Section: Study Areamentioning

confidence: 99%

Electrical resistivity tomography (ERT) of pit-and-mound microrelief, Mt Rogowa Kopa case study, the Stołowe Mountains, SW Poland

Pawlik¹,

Kasprzak²

2015

Landform Analysis

View full text Add to dashboard Cite

show abstract

“…In this case, the boulders and cobbles would have been just barely displaced from their original positions as the capping rock was undermined and broke apart. The progression toward complete destruction of buttes is illustrated by Parzoch and Migon (2015) and Migon et al (2018) . In this case, we would expect the boulders and cobbles of a given heterolithic unit to be superimposed on a small, remnant hill of Murray-formation bedrock.…”

Section: Discussionmentioning

confidence: 99%

Origin and composition of three heterolithic boulder- and cobble-bearing deposits overlying the Murray and Stimson formations, Gale Crater, Mars

Wiens

Edgett

Stack

et al. 2020

Icarus

View full text Add to dashboard Cite

Heterolithic, boulder-containing, pebble-strewn surfaces occur along the lower slopes of Aeolis Mons (“Mt. Sharp”) in Gale crater, Mars. They were observed in HiRISE images acquired from orbit prior to the landing of the Curiosity rover. The rover was used to investigate three of these units named Blackfoot, Brandberg, and Bimbe between sols 1099 and 1410. These unconsolidated units overlie the lower Murray formation that forms the base of Mt. Sharp, and consist of pebbles, cobbles and boulders. Blackfoot also overlies portions of the Stimson formation, which consists of eolian sandstone that is understood to significantly postdate the dominantly lacustrine deposition of the Murray formation. Blackfoot is elliptical in shape (62 × 26 m), while Brandberg is nearly circular (50 × 55 m), and Bimbe is irregular in shape, covering about ten times the area of the other two. The largest boulders are 1.5–2.5 m in size and are interpreted to be sandstones. As seen from orbit, some boulders are light-toned and others are dark-toned. Rover-based observations show that both have the same gray appearance from the ground and their apparently different albedos in orbital observations result from relatively flat sky-facing surfaces. Chemical observations show that two clasts of fine sandstone at Bimbe have similar compositions and morphologies to nine ChemCam targets observed early in the mission, near Yellowknife Bay, including the Bathurst Inlet outcrop, and to at least one target (Pyramid Hills, Sol 692) and possibly a cap rock unit just north of Hidden Valley, locations that are several kilometers apart in distance and tens of meters in elevation. These findings may suggest the earlier existence of draping strata, like the Stimson formation, that would have overlain the current surface from Bimbe to Yellowknife Bay. Compositionally these extinct strata could be related to the Siccar Point group to which the Stimson formation belongs. Dark, massive sandstone blocks at Bimbe are chemically distinct from blocks of similar morphology at Bradbury Rise, except for a single float block, Oscar (Sol 516). Conglomerates observed along a low, sinuous ridge at Bimbe consist of matrix and clasts with compositions similar to the Stimson formation, suggesting that stream beds likely existed nearly contemporaneously with the dunes that eventually formed the Stimson formation, or that they had the same source material. In either case, they represent a later pulse of fluvial activity relative to the lakes associated with the Murray formation. These three units may be local remnants of infilled impact craters (especially circular-shaped Brandberg), decayed buttes, patches of unconsolidated fluvial deposits, or residual mass-movement debris. Their incorporation of Stimson and Murray rocks, the lack of lithification, and appearance of being erosional remnants suggest that they record erosion and deposition events that post-date the exposure of the Stimson formation.

show abstract

“…Moreover, the sandstone boulders are 50-80 m below their original position as dictated by regional Cretaceous stratigraphy. Parzóch and Migoń (2015) analysed one of these clusters in detail and concluded that the most plausible explanation is that the boulders, some as long as 8 m, testify to the existence of a mesa that completely disintegrated, leaving only a cluster of large boulders once forming a caprock. Further protracted surface lowering of erodible mudstones brought these remnant boulders to the present-day position, far below their original place of occurrence.…”

Section: Afterlife Of a Mesamentioning

confidence: 99%

“…Among minor landforms of particular interest in the context of this study are two isolated boulder fields, located within the nearly level surfaces of the main plateau of the Stołowe Mountains (Pustelnik and Rogowa Kopa localities). They were both hypothesised to be the most resistant residuals of once existent sandstone mesas (Migoń, 2010; Parzóch and Migoń, 2015).…”

Section: Study Areamentioning

confidence: 99%

Evolution of sandstone mesas – following landform decay until death

Migoń

Różycka

Jancewicz

et al. 2018

Progress in Physical Geography: Earth and Environment

Self Cite

View full text Add to dashboard Cite

Mesas are residual landforms typical for layered rock sequences, formed due to tableland dissection and cliff retreat. Caprock cliffs are characteristic elements of mesa morphology. Mesas have finite lifetimes and over time are reduced in area, transforming into buttes and eventually into irregular arrays of boulders. Thus, they are ‘born’, when separated from a plateau, and ‘die’, when the caprock completely disintegrates. In this paper, sequential development of sandstone-capped mesas is first inferred from theory and then verified on the basis of field observations and landform inventories from a sandstone tableland of the Elbe Sandstone Mountains in the eastern part of Germany. Finally, selected morphometric parameters of mesa morphology, potentially indicative of their evolutionary phases, are computed from a high-resolution digital terrain model. Both field evidence and results of morphometric analysis indicate that mesas evolve along various pathways and, tending towards specific end-members, illustrate the principle of equifinality. Space-for-time substitution, if applied with care, may also be helpful in deciphering the geomorphic history of mesas and tracing their life until disappearance.

show abstract

Deciphering the origin of allochthonous sandstone boulder trains within a mudstone escarpment, Stołowe Mountains, SW Poland

Cited by 7 publications

References 0 publications

Electrical resistivity tomography (ERT) of pit-and-mound microrelief, Mt Rogowa Kopa case study, the Stołowe Mountains, SW Poland

Electrical resistivity tomography (ERT) of pit-and-mound microrelief, Mt Rogowa Kopa case study, the Stołowe Mountains, SW Poland

Origin and composition of three heterolithic boulder- and cobble-bearing deposits overlying the Murray and Stimson formations, Gale Crater, Mars

Evolution of sandstone mesas – following landform decay until death

Contact Info

Product

Resources

About