Geomorphodiversity of the San Lucano Valley (Belluno Dolomites, Italy): a Well-Preserved Heritage

Testa, Bruno; Aldighieri, Barbara; Bertini, Alberto; Blendinger, Wolfgang; Caielli, Grazia; Franco, R. de; Giordano, Danilo; Kustatscher, Evelyn

doi:10.1007/s12371-013-0079-3

Cited by 20 publications

(5 citation statements)

References 11 publications

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“…The middle to upper part of the Dont Formation is coeval with the Agordo Formation in the central Dolomites. The Agordo Formation is dominated by bioclastic calcarenites that alternate with fine-grained sandstones and dark limestones [11,116]. Superposing the Dont Formation and the Agordo Formation is the Richthofen Conglomerate or, along its basinal extent, a marine equivalent.…”

Section: Geological and Biological Settingmentioning

confidence: 99%

Floral Assemblages and Patterns of Insect Herbivory during the Permian to Triassic of Northeastern Italy

2016

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To discern the effect of the end-Permian (P-Tr) ecological crisis on land, interactions between plants and their insect herbivores were examined for four time intervals containing ten major floras from the Dolomites of northeastern Italy during a Permian–Triassic interval. These floras are: (i) the Kungurian Tregiovo Flora; (ii) the Wuchiapingian Bletterbach Flora; (iii) three Anisian floras; and (iv) five Ladinian floras. Derived plant–insect interactional data is based on 4242 plant specimens (1995 Permian, 2247 Triassic) allocated to 86 fossil taxa (32 Permian, 56 Triassic), representing lycophytes, sphenophytes, pteridophytes, pteridosperms, ginkgophytes, cycadophytes and coniferophytes from 37 million-year interval (23 m.yr. Permian, 14 m.yr. Triassic). Major Kungurian herbivorized plants were unaffiliated taxa and pteridosperms; later during the Wuchiapingian cycadophytes were predominantly consumed. For the Anisian, pteridosperms and cycadophytes were preferentially consumed, and subordinately pteridophytes, lycophytes and conifers. Ladinian herbivores overwhelming targeted pteridosperms and subordinately cycadophytes and conifers. Throughout the interval the percentage of insect-damaged leaves in bulk floras, as a proportion of total leaves examined, varied from 3.6% for the Kungurian (N = 464 leaves), 1.95% for the Wuchiapingian (N = 1531), 11.65% for the pooled Anisian (N = 1324), to 10.72% for the pooled Ladinian (N = 923), documenting an overall herbivory rise. The percentage of generalized consumption, equivalent to external foliage feeding, consistently exceeded the level of specialized consumption from internal feeding. Generalized damage ranged from 73.6% (Kungurian) of all feeding damage, to 79% (Wuchiapingian), 65.5% (pooled Anisian) and 73.2% (pooled Ladinian). Generalized-to-specialized ratios show minimal change through the interval, although herbivore component community structure (herbivore species feeding on a single plant-host species) increasingly was partitioned from Wuchiapingian to Ladinian. The Paleozoic plant with the richest herbivore component community, the coniferophyte Pseudovoltzia liebeana, harbored four damage types (DTs), whereas its Triassic parallel, the pteridosperm Scytophyllum bergeri housed 11 DTs, almost four times that of P. liebeana. Although generalized DTs of P. liebeana were similar to S. bergeri, there was expansion of Triassic specialized feeding types, including leaf mining. Permian–Triassic generalized herbivory remained relatively constant, but specialized herbivores more finely partitioned plant-host tissues via new feeding modes, especially in the Anisian. Insect-damaged leaf percentages for Dolomites Kungurian and Wuchiapingian floras were similar to those of lower Permian, north-central Texas, but only one-third that of southeastern Brazil. Global herbivore patterns for Early Triassic plant–insect interactions remain unknown.

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Section: Geological and Biological Settingmentioning

confidence: 99%

Floral Assemblages and Patterns of Insect Herbivory during the Permian to Triassic of Northeastern Italy

2016

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“…On the other hand, a possible relation between these dykes and the Cenozoic (Alpine) tectonomagmatic phases (a hypothesis proposed in the notes of the geological map of Trento) is totally unwarranted. In this view, the investigated Early Triassic dykes would represent additional evidence of postcollisional magmatism that has been recognized in the South Alpine domain in Trentino (Casetta et al, 2018) but also westward in Lombardia (Armienti et al, 2003;Beltrán-Triviño et al, 2016;Cassinis et al, 2008;Crisci et al, 1984) and in the Ivrea-Verbano zone (Mazzucchelli et al, 2010;Sinigoi et al, 2016), and eastward in Veneto (Bellieni et al, 2010;Testa et al, 2013).…”

Section: Tectonics 4 Discussionmentioning

confidence: 87%

Basic Dykes Crosscutting the Crystalline Basement of Valsugana (Italy): New Evidence of Early Triassic Volcanism in the Southern Alps

2018

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Basic dykes crosscutting the crystalline basement in Valsugana (Southern Alps, Italy) have been investigated for the first time in the framework of the known tectonomagmatic cycles. Petrographic observations and bulk rock analyses suggest a serial affinity variable between calc-alkaline (subordinate) and shoshonitic (prevalent), which are generally ascribed to a convergent plate setting. This is confirmed by Sr-Nd-Pb isotopic analyses that display extreme values that are often observed in postcollisional settings. A bulk rock Rb-Sr pseudoisochron suggests an age of the magmatism around 260 Ma, whereas K-Ar datings yield ages between 227 and 251 Ma, suggesting that these dykes plausibly represent a transition between the Permian and the Triassic volcanic episodes that are known in neighboring sectors of the Southern Alps. Considering that Permo-Triassic active subduction beneath the South Alpine is scarcely constrained, we ascribe the metasomatism of the related mantle sources to the Variscan cycle, proposing that magma genesis was delayed with respect to the time of the active subduction(s). According to recent reconstructions, parts of southeastern Europe, including the South Alpine domain, were formed by the breakup of the northern Gondwana margin from the Late Cambrian, in connection with important transtensional movements, leaving rifted continental basins or narrow oceanic seaways. In our view, the subduction processes that induced metasomatism in mantle sources of the South Alpine region occurred in the connection with the subsequent (Carboniferous?) consumption of lithosphere of these basins, a framework that is compatible with pervasive recycling of continental crust components within the mantle wedge. Then, calc-alkaline/shoshonite magmatism was triggered in the Early Triassic by postcollisional extensional tectonics that followed the Variscan orogenic cycle. the authors attributed the whole spectrum of these dykes to a hypothetic "alpine magmatism." This interpretation was probably influenced by the study of a single magmatic occurrence known as the lamprophyre of Calceranica, which was dated as Upper Cretaceous (71 ± 2 Ma) by Galassi et al. (1994). To cross-check this hypothesis, we collected new samples from dykes located close to the towns of Pergine and Levico and carried out petrographic investigation and major and trace element bulk rock analyses. Moreover, in order to provide further constraints, we carried out carbon (C), strontium (Sr), neodymium (Nd), and lead (Pb) isotopic analyses, as well as K-Ar dating.

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“…Within the geoparks concept, the preservation of geomorphological heritage has aroused much greater interest than other natural objects included in the concept of geodiversity (e.g. Reynard et al, 2007;Coratza and Giusti, 2005;Testa et al, 2013;Melelli et al, 2017) with some exceptions such as paleontological sites (e.g. Sá dos Santos et al, 2016).…”

Section: Publications and Geoparks By Country Using Geoheritage Papermentioning

confidence: 99%

Geodiversity and geoheritage: Detecting scientific and geographic biases and gaps through a bibliometric study

Ibáñez

Brevik

Cerdà

2019

Science of The Total Environment

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• Geodiversity and pedodiversity should receive as much attention as biodiversity. • Pedodiversity is part of geodiversity but rarely considered in geodiversity studies. • Pedodiversity studies followed biodiversity methodologies, geodiversity did not. • Geodiversity has focused on the proposal of geoparks, geotourism, and education. • Researching relationships between bio-, pedo-and geodiversity would be fruitful.

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Geomorphodiversity of the San Lucano Valley (Belluno Dolomites, Italy): a Well-Preserved Heritage

Cited by 20 publications

References 11 publications

Floral Assemblages and Patterns of Insect Herbivory during the Permian to Triassic of Northeastern Italy

Floral Assemblages and Patterns of Insect Herbivory during the Permian to Triassic of Northeastern Italy

Basic Dykes Crosscutting the Crystalline Basement of Valsugana (Italy): New Evidence of Early Triassic Volcanism in the Southern Alps

Geodiversity and geoheritage: Detecting scientific and geographic biases and gaps through a bibliometric study

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