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Journal Article
Published: 01 May 1982
Journal of Paleontology (1982) 56 (3): 823-825.
Journal Article
Published: 01 July 1974
Journal of Paleontology (1974) 48 (4): 844-845.
Journal Article
Published: 01 January 1968
Micropaleontology (1968) 14 (1): 97-104.
... by maceration. Layering and ornamentation may be observed in surface views of detached megaspore membranes, but clarity is greater if microtome sections are prepared. Fragments of the nucellus which sometimes remain associated with the megaspore membranes supplement these features and aid in the recognition...
Journal Article
Published: 01 October 1964
Micropaleontology (1964) 10 (4): 486-490.
...Howard W. Lee Abstract Selection and proper execution of the best-suited maceration method are key factors in palynological studies. Household bleach, HNO 3 , and KOH used in successive steps, with application of moderate heat and vigorous agitation during each step, successfully macerate some...
Journal Article
Published: 01 July 1958
Micropaleontology (1958) 4 (3): 327-328.
FIGURE 7 —<b>Maceration</b> of uncalcified cuticle and exposure of underlying calc...
Published: 01 September 2008
FIGURE 7 —Maceration of uncalcified cuticle and exposure of underlying calcified regions in deployed specimens. A) Deployed movable finger showing loss of distal tip (left) and V-shaped reentrant on proximal side (right). B) Close-up of A showing V-shaped reentrant, disks, and fungiform projections
All figures x625. In all cases <b>maceration</b> and slide numbers are followed by...
in > Palynology
Published: 01 January 2000
PLATE 1 All figures x625. In all cases maceration and slide numbers are followed by microscope (Leitz Orthoplan No. 986086) vernier and England Finder coordinates (the latter for type specimens). 1 Plaesiodictyon mosellanum spp. bullatum n. spp. (Holotype); note dehiscence slits; 31244-A-1
Series: GSA Special Papers
Published: 01 January 1993
DOI: 10.1130/SPE286-p63
... Analyses of modern Indonesian peat samples reveal that the optical characteristics of peat constituents are consistent with the characteristics of macerals observed in brown coal and, as found by previous workers, brown-coal maceral terminology can be used in the analysis of modern peat. A core...
Journal Article
Published: 01 November 1984
Canadian Journal of Earth Sciences (1984) 21 (11): 1209-1228.
...P. Dobell; A. R. Cameron; W. D. Kalkreuth Abstract The response to oxidation of eight coals of lignite and subbituminous rank from Saskatchewan and Hat Creek, British Columbia, was studied by means of maceral distribution, fluorescence, and scanning electron microscopy (SEM). The oxidizing agent...
Relative frequency of <b>maceral</b> types, categorized by <b>maceral</b> group, from 500...
Published: 01 December 2013
Fig. 7.— Relative frequency of maceral types, categorized by maceral group, from 500-point counts of Val d'Amour (VA-series) and Campbellton (CF-series) Formation samples. Precise values are supplied in Table 1 .
Origin and paleoenvironmental significance of <b>maceral</b>, <b>maceral</b> groups, and ...
Published: 01 June 2011
Table 2 Origin and paleoenvironmental significance of maceral, maceral groups, and minerals recognized in this study.
Stratigraphic distribution of <b>maceral</b> groups. <b>Maceral</b> % curve based on coun...
in > Palynology
Published: 01 January 2001
Text-Figure 4. Stratigraphic distribution of maceral groups. Maceral % curve based on counts of the first 100 objects observed per sample (see Table 2 ); samples within a measured section were averaged together. Sphaeromorph % and Specimen Counts were measured during a separate tally
Journal Article
Published: 21 August 2000
Canadian Journal of Earth Sciences (2000) 37 (9): 1209-1228.
...W. Kalkreuth; D. Marchioni; J. Utting Abstract Coal petrology and palynology of the Minto coal seam enable depositional environments of the precursor mire to be established in terms of facies-critical maceral ratios, maceral assemblages, and spore and pollen assemblages. The overall petrographic...
FIGURES | View All (12)
Series: AAPG Studies in Geology
Published: 01 January 1998
DOI: 10.1306/St45CD655C11
EISBN: 9781629810195
... Abstract The accompanying atlas of coal petrology provides about 300 images of macerals and of minerals in coals. The geographic coverage, while worldwide, emphasizes the coals and regions the authors study most frequently. Images of unique maceral and mineral assemblages are provided. The lack...
Journal Article
Journal: Economic Geology
Published: 01 April 1995
Economic Geology (1995) 90 (2): 246-254.
...Donald D. Hickmott; W. S. Baldridge Abstract Proton-induced X-ray emission (PIXE) microanalysis is shown to be capable of semiquantitative to quantitative standardless determination of trace element abundances in coal macerals and sulfides using an internal normalization protocol. PIXE spectra...
Series: SEPM Short Course Notes
Published: 01 January 1991
DOI: 10.2110/scn.91.25.0107
EISBN: 9781565761063
... Abstract: Organic petrography is the study of the optical properties of the solid organic constituents (termed macerals) in sedimentary rocks whether the rocks be organic-rich coals, oil shales, petroleum source-rocks or shales, sandstones and limestones with trace dispersed organic matter (DOM...
Series: SEPM Short Course Notes
Published: 01 January 1980
DOI: 10.2110/scn.80.01.0072
EISBN: 9781565762374
... Abstract The reflectance of a coal sample is usually measured on the vitrinite macerals because this group of macerals shows a fairly uniform increase of reflectance with increasing rank. However, there are some important jumps or discontinuities with the increase in rank, especially...
Journal Article
Published: 01 May 1998
Bulletin de la Société Géologique de France (1998) 169 (3): 381-393.
...), petrologically (maceral and microlithotype analysis) and geochemically (Rock-Eval pyrolysis). The vertical distribution of lithotypes and microlithotypes point to water table oscillations during the period of peat accumulation. The site of peat accumulation, however, was permanently covered with water. Maceral...
Series: GSA Special Papers
Published: 01 January 1993
DOI: 10.1130/SPE286-p153
... a coal seam: enhanced preservation and reduced biochemical geliflcation within similar tissues; decreasing abundance of liptinite macerals of aquatic affinity, sulfur (especially pyritic) content, and waterborne ash; and decreasing floral diversity. Reversals in these trends may signal change...
Journal Article
Published: 01 July 1963
Journal of Paleontology (1963) 37 (4): 900-916.
...Frederick W. Cropp Abstract Sixty-six coals from Tennessee have been macerated and the spore assemblages of 15 of the coals have been studied. These 15 coals were chosen to give a stratigraphic representation of the various portions of the Pennsylvanian section exposed in Tennessee. Judging from...