The sediments are compositionally mature to submature and classified as quartz arenite
The transfer of interests in P2304 from Europa and Arenite
to Egdon is subject to OGA approval.
The Lard Formation is mainly a calcite-cemented, fine- to medium-grained, well- to sub-rounded to sub-angular, 90 percent quartz arenite
of marine shoreface origin (Hickin and others, 2010).
Donaldson, A., and Hilowle, M.A., 2002, Organic mats, evaporite pseudomorphs and soft-sediment deformation in quartz arenites
of the Cambro-Ordovician Nepean Formation: GAC-MAC, Saskatoon 2002, Program with Abstracts, [http://gac.esd.mun.ca/gac_2002/search_abs/ sub_program.asp?sess=98&form=10&abs_no=73]
"The carbonate always has a different behavior than arenite
, which is more homogenous.
Sample Grain size Classification Sorting 1 0.063-0.125 Very fine sand Very well 2 0.063-0.125 Very fine sand Very well 3 0.063-0.125 Very fine sand Very well 4 0.063-0.125 Very fine sand Very well 5 0.038-0.063 Coarse silt Moderate 6 0.038-0.063 Coarse silt Moderate 7 0.038-0.063 Coarse silt Moderate Sample Grain size Dominant clast Description 1 0.063-0.125 60-70% quartz Quartz arenite
sand 2 0.063-0.125 60-70% quartz Quartz arenite
sand 3 0.063-0.125 60-70% quartz Quartz arenite
sand 4 0.063-0.125 60-70% quartz Quartz arenite
sand 5 0.038-0.063 60-70% quartz Quartz silt w/ shell and organic fragments 6 0.038-0.063 60-70% quartz Quartz silt w/ shell and organic fragments 7 0.038-0.063 60-70% quartz Quartz silt w/ shell and organic fragments
The sediments were affected by minor tectonism which ultimately led to the development of mature sandstones nomenclature as Quartz arenite
and Quartzose arenite
The magaripples occur on the upper bedding plane of a 35-cm thick, medium to coarse-grained quartz arenite
. This bed is both underlain and overlain by fine quartz sandstone, interbedded with micaceous siltstone beds, some of which preserve a well-developed Cruziana ichnofacies association.
The marine unit is characterized by a well-sorted, subrounded, low sphericity, fine-grained quartz arenite
representing sediments of the Princess Anne terrace.
From a geo-lithological point of view, the area is characterized by a wide heterogeneity of types: from clayey-calcareous substrata such as limestone, calcareous arenite
, silty marl, grey clayey marl, polychromatic marl and clay, to siliceous sandstone.
Fine-grained sandstone, quartz arenite
. Some is partially metamorphosed; quartz porphyroclasts in a partially recrystallized and aligned matrix and boundaries of some of the quartz porphyroclasts are breaking down.