Mollisols are dark colored, carbon‐rich mineral soils occupying a large proportion (836 soil series) of the soils of the Central Plains of the United States. By contrast, only eight official soil series of Mollisols have been mapped in Alaska (six Haplocryolls, one Calcicryoll, one Haplogeloll). Little information exists about Geloll pedogenesis, taxonomic variability, and extent. In this study, 39 horizons were morphologically described across ten Geloll pedons in northern Alaska. Based on analogous taxonomic structure in Cryolls, two pedons would meet the criteria for a Fluventic subgroup as the organic carbon content was ≥0.3% (1.47% and 0.88%) at a depth of 125 cm below the mineral soil surface. Three pedons would meet the criteria for a Pachic subgroup because the mollic epipedon was thicker than 40 cm (52 cm, 53 cm, and 54 cm) and the texture class was finer than loamy fine sand (sandy loam). However, no Fluventic or Pachic subgroups currently exist for Haplogelolls. Two pedons were classified as Cumulic Haplogelolls, and three pedons were Typic Haplogelolls. Field and laboratory characterization allowed for the development of a Geloll pedogenic concept generally represented by well‐drained soils with limestone and/or dolomitic parent material. Such soils generally feature thin or no surficial organic horizons and large quantities of coarse fragments and coarse textured materials. Soil organic carbon calculations for suspected areas of Alaska Gelolls total 1.18 Pg; closely aligning with estimates of previous studies. Future work should expand the explanatory taxonomy based on new morphological expressions observed throughout gelic temperature regime regions.

中文翻译：

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美国北阿拉斯加的Gelolls的表征

软体动物是深色的，富含碳的矿质土壤，占美国中原土壤的很大一部分（836个土壤系列）。相比之下，在阿拉斯加仅绘制了8个官方土壤系列Mollisol（6个Haplocryolls，1个Calcicryoll，1个Haplogeloll）。关于Geloll的成虫作用，分类学变异性和程度的信息很少。在这项研究中，在阿拉斯加北部的十个Geloll脚架上用形态学描述了39个地平线。根据Cryolls中类似的生物分类结构，由于在矿物土壤表层以下125 cm处有机碳含量≥0.3％（1.47％和0.88％），因​​此两个脚架将满足Fluventic亚组的标准。三个脚架将满足Pachic亚组的标准，因为该分子脚架的厚度大于40厘米（52厘米，53厘米，和54厘米），质地等级比壤土细砂（沙质壤土）细。但是，目前尚无Haplogelolls的Fluventic或Pachic子组。两个脚架被归类为累积性唇齿elo，三个脚轮被归类为典型性唇齿elo。野外和实验室特征可以发展出Geloll的土壤成因概念，该概念通常表现为排水良好的土壤，其中含有石灰石和/或白云母质。这样的土壤通常具有稀薄的或没有表层的有机层，以及大量的粗糙碎片和粗糙纹理材料。阿拉斯加Gelolls可疑地区的土壤有机碳计算总量为1.18 Pg；与先前研究的估计非常吻合。未来的工作应基于在整个凝胶温度范围区域内观察到的新形态表达，扩展解释性分类学。