Micropaleontology最新文献_第9页

Buzasina antarctica n. sp., a new lituolid foraminifer from the Upper Cretaceous at IODP Site 1512, Great Australian Bight Buzasina antarctica n. sp.，大澳大利亚湾IODP Site 1512上白垩统一种新的岩质有孔虫

IF 1.5 4区地球科学

Micropaleontology Pub Date : 2020-01-01 DOI: 10.47894/mpal.66.2.04

M. Kaminski, E. Wolfgring, A. Waśkowska

引用次数: 1

The Permian podocopids (Crustacea: Ostracoda) from the Serra Alta and Teresina formations, Parana Basin, Brazil 巴西巴拉那盆地Serra Alta和Teresina组的二叠纪足类(甲壳纲:介形虫纲)

IF 1.5 4区地球科学

Micropaleontology Pub Date : 2020-01-01 DOI: 10.47894/mpal.66.4.03

C. T. Bergue, Maria da Saudade Araujo Santos Maranhao, Christiano Ng

引用次数: 4

Pseudochoffatella minima n. sp., a new Larger Benthic Foraminifera from the Lower Cretaceous of Central Iran 伊朗中部下白垩世一种新的大型底栖有孔虫目Pseudochoffatella minima n.sp

IF 1.5 4区地球科学

Micropaleontology Pub Date : 2020-01-01 DOI: 10.47894/mpal.66.2.08

F. Schlagintweit, K. Rashidi, Reza Hanifzadeh

引用次数: 3

Integrated micropaleontology, sedimentology and sequence stratigraphy of the Middle Jurassic D5-D6 Members of the Dhruma Formation, Central Saudi Arabia 沙特阿拉伯中部Dhruma组D5-D6段微体古生物学、沉积学和层序地层学综合研究

IF 1.5 4区地球科学

Micropaleontology Pub Date : 2020-01-01 DOI: 10.47894/mpal.66.6.05

M. H. Malik, L. Babalola, K. Al-Ramadan, M. Kaminski

{"title":"Integrated micropaleontology, sedimentology and sequence stratigraphy of the Middle Jurassic D5-D6 Members of the Dhruma Formation, Central Saudi Arabia","authors":"M. H. Malik, L. Babalola, K. Al-Ramadan, M. Kaminski","doi":"10.47894/mpal.66.6.05","DOIUrl":"https://doi.org/10.47894/mpal.66.6.05","url":null,"abstract":"The Middle Jurassic Dhruma Formation of Saudi Arabia is of economic importance because it contains three hydrocarbon reservoirs. We report the first record of physically extracted benthic foraminiferal assemblages from the Middle Jurassic D5 and D6 member outcrops near Riyadh, Central Saudi Arabia, using the acetic acid method. This study of Middle Jurassic limestone units is intended to improve our understanding about the depositional environments of the area and related bio-events. Microfossils such as foraminifera are important in this aspect in that they can be recovered from core samples where entiremacrofossils such as ammonites are rare. This study focuses on the taxonomy and biostratigraphy of the foraminifera and examines their contribution to the previously established Jurassic biozonation.Atotal of 35 species belonging to 19 genera are identified. Ten sedimentological facies showing depositional energy variations from deep marine muds to shallow high-energy oolitic grainstones are identified. The extracted foraminifera are tied to the stratigraphic and sedimentological columns of the D5â€“D6 member outcrop. The depositional environment model of this portion of the formation is interpreted to be an open marine ramp setting.","PeriodicalId":49816,"journal":{"name":"Micropaleontology","volume":"1 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70444903","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Distribution of Alveolina assemblages in the Ypresian (Ilerdian-Cuisian) successions from Iran and Turkey (central and western Tethys): biostratigraphic implications for regional correlation 伊朗和土耳其(特提斯中部和西部)伊波斯(伊勒尔-库西亚)地层中肺泡藻组合的分布:区域对比的生物地层意义

IF 1.5 4区地球科学

Micropaleontology Pub Date : 2020-01-01 DOI: 10.47894/mpal.66.1.02

M. Hadi, N. Ozgen-Erdem, Derya Sinanoğlu, S. Sarkar, Azam Zareh

{"title":"Distribution of Alveolina assemblages in the Ypresian (Ilerdian-Cuisian) successions from Iran and Turkey (central and western Tethys): biostratigraphic implications for regional correlation","authors":"M. Hadi, N. Ozgen-Erdem, Derya Sinanoğlu, S. Sarkar, Azam Zareh","doi":"10.47894/mpal.66.1.02","DOIUrl":"https://doi.org/10.47894/mpal.66.1.02","url":null,"abstract":"Benthic foraminiferal assemblages dominated by Alveolina species from the Ypresian (Ilerdian-Cuisian) are studied herein from numerous localities of Iran and Turkey. From these successions, highly diversified assemblage of 58 alveolinid species are identified along with their detailed biostratigraphical application, which resulted in the recognition of eight shallow benthic zones (SBZ5-SBZ12). Our findings are based upon the distribution ranges of Alveolina from the Ilerdian-Cuisian sediments in Iran (Central Tethys) that are considered to have a strong affinity with their coeval fauna in Turkey (Western Tethys). In this study, the wide expansion ranges of Alveolina permit us to achieve a high-resolution biostratigraphy and apply the shallow benthic zones of the peri-Mediterranean region (Western Tethys) to the Ilerdian-Cuisian successions in Iran (Central Tethys). Nevertheless, the distribution of some Alveolina species, even the zonalmarkers consisting of Glomalveolina lepidula, Alveolina ellipsoidalis, A. pisiformis, A. laxa, A. subpyrenaica, A. varians, A. fornasinii and A. canavarii are found occurring at younger stratigraphic levels in Iran and/or Turkey than in the western European shallow marine deposits.","PeriodicalId":49816,"journal":{"name":"Micropaleontology","volume":"1 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70444039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Cribellopsis delicatula n. sp., an early Orbitolinidae from the upper Berriasian to lower Valanginian of SE France, Switzerland and Iran 法国东南部、瑞士和伊朗的上柏利亚亚至下瓦兰吉尼亚的一个早期圆蚊科

IF 1.5 4区地球科学

Micropaleontology Pub Date : 2020-01-01 DOI: 10.47894/mpal.66.4.05

F. Schlagintweit, M. Yazdi-Moghadam

引用次数: 4

Fusulinids from slope debris flow beds in the Word Formation (Guadalupian, Middle Permian), Gilleland Canyon, northwestern Glass Mountains, West Texas 西德克萨斯州玻璃山西北部Gilleland峡谷Word组(Guadalupian，中二叠世)斜坡碎屑流床中的Fusulinids

IF 1.5 4区地球科学

Micropaleontology Pub Date : 2020-01-01 DOI: 10.47894/mpal.66.6.01

G. Wahlman, George C. Vaughan, M. Nestell

{"title":"Fusulinids from slope debris flow beds in the Word Formation (Guadalupian, Middle Permian), Gilleland Canyon, northwestern Glass Mountains, West Texas","authors":"G. Wahlman, George C. Vaughan, M. Nestell","doi":"10.47894/mpal.66.6.01","DOIUrl":"https://doi.org/10.47894/mpal.66.6.01","url":null,"abstract":"Three Guadalupian allochthonous debris flow beds in a slope-to-basin facies succession in northern Gilleland Canyon of the northwest Glass Mountains were sampled for fusulinid biostratigraphic age-dating. The deeper water allochthonous debris flow beds underlie the shelf-margin packstone-grainstone facies of the Willis Ranch Member of the Word Formation (3rd Word Limestone Bed of King 1931) (middle Guadalupian, early Wordian), which forms a distinct bench all along the west wall of Gilleland Canyon (114â€“169m above base of measured section). The uppermost GV-RC1 sample, from 104 m in the measured section, contained the fusulinids Parafusulina sellardsi, P. antimonioensis, P. deliciasensis, P. rothi, P. trumpyi, and P. boesei. SampleGV-CM1, from 83min the section, contained P. sellardsi, P. deliciasensis, P. rothi, P. boesei, and P. lineata. The lowest sample GV-CM20, from 76 m in the section, contained only P. deliciasensis and P. wildei. According to previous studies, most of these species appear in Roadian-aged strata and range upward into early Wordian-aged strata, but the common occurrence of P. sellardsi in the upper two samples, and the occurrence of P. antimonioensis in the uppermost sample confirm an early Wordian age.","PeriodicalId":49816,"journal":{"name":"Micropaleontology","volume":"1 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70444551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Contrasting paleoecologies of spiral and serial benthic foraminifera in deep middle bathyal exposures, lower to middle Miocene Brasso Formation, Trinidad,West Indies 西印度群岛特立尼达中新世下至中Brasso组深中深海暴露区螺旋形底栖有孔虫与串联底栖有孔虫古生态对比

IF 1.5 4区地球科学

Micropaleontology Pub Date : 2020-01-01 DOI: 10.47894/mpal.66.4.01

B. Wilson, L. Hayek

{"title":"Contrasting paleoecologies of spiral and serial benthic foraminifera in deep middle bathyal exposures, lower to middle Miocene Brasso Formation, Trinidad,West Indies","authors":"B. Wilson, L. Hayek","doi":"10.47894/mpal.66.4.01","DOIUrl":"https://doi.org/10.47894/mpal.66.4.01","url":null,"abstract":"Multilocular benthic foraminifera are divisible into serial (Se) and spiral (Sp) morphogroups. Beneath oxic bottom waters, the Se morphogroup lives infaunally. Spiral species are typically epifaunal. Thus, the Se infauna react to different environmental factors from most Sp epifauna. Previous investigations of the Se:Sp ratio found that the serial infauna migrate toward the sediment/water interface with decreasing sediment oxygen levels, increasing the Se:Sp ratio in suboxic environments. We examine assemblage turnover within the Se and Sp morphogroups at two Brasso Formation exposures (planktonic foraminiferal Zones M4b-M6, deep middle bathyal palaeodepth). Ten samples were taken from Mayo Pond Side (MPS), and four from the stratigraphically younger Mayo Quarry Southside (MQSS). Across all samples, the Se morphogroup species richness was almost the same as that for the Sp morphogroup. The mean Shannon Function H did not differ between the exposures. At MPS, approxiimately 20% of the total assemblage belonged to the Se morphogroup, compared with approximately 36% at MQSS, giving a higher Se:Sp ratio at MQSS than at MPS. A sample-wise assemblage turnover index (ATIs) was calculated across the exposures. A peak in total assemblage ATIs reflected the MPS and MQSS samples being taken from different biofacies (MQSS = Cibicidoides crebbsi dominant; MPS = Anomalinoides mecatapenensis dominant). Mean ATIs (total assemblage) differed significantly between the exposures. Across all samples, mean Se ATIs was significantly different from and greater than mean Sp ATIs. ANOVA was used to compare means of Se ATIs and Sp ATIs at MPS and MQSS (four means in total). It showed a significant difference between at least two means. At both exposures the Se morphogroup's ATIs was greater than the Sp ATIs. This greater Se ATIs is apparently related to changing dissolved oxygen concentrations in sediment pore water associated with increasing proximity to an oxygen minimum zone over time.","PeriodicalId":49816,"journal":{"name":"Micropaleontology","volume":"1 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70444651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

New data on Pseudolituonella Marie 1954, emended herein, benthic foraminifera from the Cenomanian of the Sarvak Formation of SWIran (Zagros Zone) - Phylogenetic considerations SWIran (Zagros区)Sarvak组Cenomanian底栖有孔虫，1954年Marie伪利菌的新资料，在此修订。系统发育的考虑

IF 1.5 4区地球科学

Micropaleontology Pub Date : 2020-01-01 DOI: 10.47894/mpal.66.6.04

F. Schlagintweit, M. Yazdi-Moghadam

引用次数: 1

Late Campanian to early Maastrichtian planktonic foraminiferal assemblages from Cretaceous oceanic red beds (CORBs) in the Yongla section, Gyangze, southern Tibet 藏南江孜永拉剖面白垩系海洋红层(CORBs)晚坎帕世至早马斯垂克期浮游有孔虫组合

IF 1.5 4区地球科学

Micropaleontology Pub Date : 2020-01-01 DOI: 10.47894/mpal.66.2.01

Pei Fang, Bo Xu, B. Huber, Shijia Liu, Youhua Zhu, Hui Luo

引用次数: 2