Small Karst Features (Karren) of Dugi Otok Island and Kornati Archipelago Coastal Karst (Croatia)

Perica, Dražen; Marjanac, Tihomir; Aničić, Branka; Mrak, Irena; Juračić, Mladen

doi:10.3986/ac.v33i1.319

Cited by 4 publications

(4 citation statements)

References 1 publication

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“…In landforms built of carbonate rocks, megakarren develop in tropical areas or in glaciokarst, with development linked to karstification and/or climatic changes, resulting in distinct origins of the same feature in different lithologies (Perica, 2004;Veress, 2019). It is possible to draw parallels between the development of forms and understanding the dissolution factors.…”

Section: Discussionmentioning

confidence: 99%

Origin and evolution of solutional features on granitic inselbergs

Santos,

Maia,

Travassos

et al. 2023

RBGeomorfologia

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Inselbergs are landforms shaped by a number of erosion processes. They can be characterized either by a predominance of dissolution features or fracturing and occasionally exhibit massive slopes. In this study we demonstrate the main structural mechanisms driving the formation of dissolution features, such as gnammas. In granitic rocks, mafic ellipsoidal enclaves can act as a starting point for differential erosion. The enclaves and their orientation control the early stages of dissolution features (ellipsoidal microcavities and gnammas). In the Pedra do Cruzeiro inselberg, located in Quixadá, northeastern Brazil, 99 enclaves were analyzed in a 230m SW-NE transect on the inselberg slope. The data show that the primary trend of enclave orientation (86E on average) coincides with the orientation of the majority (97%) of dissolution features in their first and second stages. In advanced erosion phases in which mega karren are developed, they are not solely controlled by preexisting structural patterns, attesting to the superimposition of the surface runoff of the inselberg over the structure (e.g., magmatic foliation and mafic enclave orientation).

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Section: Discussionmentioning

confidence: 99%

Origin and evolution of solutional features on granitic inselbergs

Santos,

Maia,

Travassos

et al. 2023

RBGeomorfologia

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“…Such small karstic forms that are made by surficial dissolution on bare or lightly vegetated carbonate rocks are also known as solution pits or, in the case of larger diameters, solution pans [4,[65][66][67][68]. Although solution pans are documented in some tropical parts of Central America, such as the currently submerged solution pans of the Yucatán Peninsula [69], these terms have been rarely used in the scientific literature.…”

Section: Landforms and Processes Within The Ciénega De El Manglementioning

confidence: 99%

Past and Present Drivers of Karst Formation of Ciénega de El Mangle, Panama

Rivera-Solís,

Quesada-Román,

Domazetović

2023

Quaternary

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Tropical coastal karst areas represent dynamic, fragile, and biodiverse environments. Central America’s karst regions have been scarcely studied, with most of the research focused on the northern part of the region and on several larger cave systems. The coastal carbonate zones of the Central American region represent a unique karstic landscape, which, so far, has been insufficiently studied. Therefore, in this paper, we aim to describe the (i) landscape geomorphology and (ii) chemical conditions that define Ciénega de El Mangle in Panama as a distinctive karstic site. Carried geomorphological mapping and the characterization of karstic features have resulted in the identification of the different karstic forms and processes that are present within this unique karstic area. Considering that the chosen karstic study area is located in a marine–coastal fringe on the periphery of a lagoon, it is affected by a combination of several factors and processes, including seawater intrusion (through sinkholes), the formation of conchiferous limestone (CaCO3), and NaCl precipitation related to efflorescence. Due to the seasonally humid tropical climate, the chemical weathering processes are intense, thus forming alkaline soils that are hindering the development of mangrove vegetation. The geomorphology of the area results from intense evaporation combined with an influx of brackish groundwater, due to which a landscape has evolved in the marine–coastal strips, of seasonal tropical climates, that exhibit saline beaches, known as a littoral shott. In total, 24 karstic microdolines have evolved within the shott, of which six represent domical geoforms formed by gradual evaporitic precipitation, while seven other geoforms represent active karstic sinkholes filled with brackish water. These results are key for understanding the past and present climate interactions and conditions that have led to the formation of tropical karst environments.

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“…Dugi Otok Island is made of carbonates of the Cretaceous age that have been deposited in deeper environments compared to carbonates from most of the other localities in coastal Croatia. These are commonly micritic-type limestones, occasionally with evidence of deposition from mass-flow and slope instabilities (Perica et al 2004).…”

Section: Study Sitesmentioning

confidence: 99%

Halotolerant and chaotolerant microfungi from littoral anchialine caves Golubinka and Medova Buza (Croatia)

Chlebicki¹,

Jakus²

2019

JCKS

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Rock-inhabiting fungi were isolated for rock walls in Golubinka and Medova Buža littoral anchialine caves in Croatia and tested for their halotolerance. Isolates were identified as Cladosporium psychrotolerans, C. delicatulum, Mucor circinelloides, Rhizopus stolonifer, Aureobasidium pullulans var. pullulans, and Talaromyces diversus. Of them, T. diversus appears most resistant to cosmotropic (NaCl) and chaotropic (KCl) salts. It was also the most common species isolated from rock walls. Despite the negative influence of salinity on acid production, we propose that some fungal strains can be recognized as active agents in carbonate dissolution and as good competitors on rocks in saline environments. Anchialine caves can be a refugium for unique halotolerant fungi.

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Small Karst Features (Karren) of Dugi Otok Island and Kornati Archipelago Coastal Karst (Croatia)

Cited by 4 publications

References 1 publication

Origin and evolution of solutional features on granitic inselbergs

Origin and evolution of solutional features on granitic inselbergs

Past and Present Drivers of Karst Formation of Ciénega de El Mangle, Panama

Halotolerant and chaotolerant microfungi from littoral anchialine caves Golubinka and Medova Buza (Croatia)

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