Micromorphological Characteristics of Vertisols of Iran, Including Nonsmectitic Soils

Heidari, Ahmad; Mahmoodi, Shahla; Stoops, Georges; Mees, Florias

doi:10.1080/15324980590887164

Cited by 14 publications

(7 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Fig. 9: Correlation between the mean annual precipitation (MAP) and the upper depth of the pedogenic carbonate horizon (Bk) (data in Heidari et al, 2004;Khormali et al, 2012Khormali et al, , 2006Khormali et al, , 2003Khresat, 2001;Kovda et al, 2014;Kuzyakov, 2006;Royer, 1999Royer, , n = 1542. Fig.…”

Section: Accepted M M a N U mentioning

confidence: 97%

Pedogenic carbonates: Forms and formation processes

Zamanian

Pustovoytov

Kuzyakov

2016

Earth-Science Reviews

414

234

View full text Add to dashboard Cite

Section: Accepted M M a N U mentioning

confidence: 97%

Pedogenic carbonates: Forms and formation processes

Zamanian

Pustovoytov

Kuzyakov

2016

Earth-Science Reviews

414

234

View full text Add to dashboard Cite

“…Retallack (2001) associates these soils with fluvial channels and/or lowlands. Heidari et al. (2005) observed present‐day Vertisol in Western Iran in lowland areas dominated by alluvial and lacustrine deposits.…”

Section: The Palaeosolsmentioning

confidence: 80%

Climate‐induced sediment‐palaeosol cycles in a Late Cretaceous dry aeolian sand sheet: Marília Formation (North‐West Bauru Basin, Brazil)

Basílici¹,

Bo²,

Ladeira

2009

Sedimentology

View full text Add to dashboard Cite

Aeolian sand sheets, which are characterized by low relief surfaces that lack dunes, are common in arid and semi-arid climatic settings. The surface of an aeolian sand sheet can either be stable and subject to pedogenetic effects, or unstable such that it is affected by deflation or sedimentation. The Marília Formation (Late Cretaceous) may be interpreted as an ancient aeolian sand sheet area, where alternating phases of stability and instability of the accumulation surface have been recorded. Detailed field studies were carried out in several sections of the Marília Formation, where cyclic alternations of palaeosols and aeolian deposits were evident, using palaeopedological and facies analysis methods, supported in the laboratory by the analysis of rock samples, cut and polished in slabs, thin sections, scanning electron microscope images and X-ray diffraction data from the clay minerals. The deposits comprise three lithofacies that, in order of abundance, are characterized by: (i) translatent wind-ripple strata; (ii) flood deposits; and (iii) ephemeral river channel deposits. Palaeosols constitute, on average, 65% of the vertical succession. Three types of palaeosols (pedotypes) are recognized: (i) Aridisols; (ii) Entisols; and (iii) Vertisols. Erosional surfaces due to aeolian deflation divide the top of the palaeosol profiles from the overlying aeolian deposits. The palaeoenvironmental interpretation of the deposits and the palaeosols allows the depositional system of the Marília Formation to be defined as a flat area, dominated by aeolian sedimentation, with subordinate ephemeral river sedimentation, and characterized by a dry climatic setting with occasional rainfall. The climate is the main forcing factor controlling the alternation between episodes of active sedimentation and periods of palaeosol development. A climate-controlled model is proposed in which: (i) the palaeosols are indicative of a stable surface that is developed during the more humid climatic phases; and (ii) the erosional surfaces and the overlying aeolian sediments attest to periods of deflation and subsequent sedimentation, thereby increasing the availability of sediment during the drier climatic phases. The ephemeral fluvial deposits mark the more humid climatic conditions and contribute to the lagged sediment influx caused during the drier periods by the erosion of previously stored sediment.

show abstract

“…Due to weathering and biological activity these infillings are more incorporated into the soil groundmass because their boundaries are barely seen 33 . In addition, they have granostriated b-fabric 27 , which are signs of pedoturbation 34 .…”

Section: Discussionmentioning

confidence: 99%

Origin of clay minerals in Early Eocene volcanic paleosols on King George Island, Maritime Antarctica

Spinola

Pi‐Puig

Solleiro‐Rebolledo

et al. 2017

Sci Rep

View full text Add to dashboard Cite

The paleoclimate during the Early Eocene in Maritime Antarctica is characterized by cool conditions without a pronounced dry season. Soils formed on volcanic material under such climate conditions in modern analogue environments are usually Andosols rich in nanocrystalline minerals without pedogenic smectite. The paleosols formed on volcanic material on King Georges Island are covered by basalts, dated by 6 new 40Ar/39Ar datings to 51–48 Ma, and are rich in smectite. A pedogenic origin of the smectites would suggest a semi-arid rather than a wet non-seasonal humid paleoclimate. To investigate the origin of the smectites in these paleosols we used X-ray diffraction and microscopic techniques. Minor mineralogical changes between the volcanic parent material and the paleosols and a homogenous distribution of smectites throughout the paleosol horizons indicate that these smectites were mainly inherited from the pyroclastic parent material, which was altered prior to surficial weathering. Nevertheless, the mineralogical properties, such as degree of crystallinity and octahedral site occupancy, of these smectites were modified during the ancient soil formation. Our findings highlight that trioctahedral smectites were a product of deuteric alteration of pyroclastic rocks and were progressively transformed to dioctahedral smectites during weathering in a soil environment on King George Island.

show abstract

Micromorphological Characteristics of Vertisols of Iran, Including Nonsmectitic Soils

Cited by 14 publications

References 20 publications

Pedogenic carbonates: Forms and formation processes

Pedogenic carbonates: Forms and formation processes

Climate‐induced sediment‐palaeosol cycles in a Late Cretaceous dry aeolian sand sheet: Marília Formation (North‐West Bauru Basin, Brazil)

Origin of clay minerals in Early Eocene volcanic paleosols on King George Island, Maritime Antarctica

Contact Info

Product

Resources

About