{"id":1567,"date":"2012-09-05T07:26:07","date_gmt":"2012-09-05T13:26:07","guid":{"rendered":"http:\/\/sanuja.com\/blog\/?p=1567"},"modified":"2013-05-27T23:51:52","modified_gmt":"2013-05-28T05:51:52","slug":"stratigraphic-cross-section-at-exshaw-alberta","status":"publish","type":"post","link":"https:\/\/sanuja.com\/blog\/stratigraphic-cross-section-at-exshaw-alberta","title":{"rendered":"Stratigraphic cross section at Exshaw, Alberta"},"content":{"rendered":"

Warning!<\/strong><\/p>Disclaimer:<\/b> Information is provided as an example of field geology<\/em> data and it is NOT intended to use as a reference material.<\/b> Please use the materials at your own discretion<\/u>.<\/div>
\n

\"\"<\/a>
Exshaw, Alberta. Copyright © 2012<\/figcaption><\/figure>
\nLocation: 11 U 0627438 E \/ 5658531 N (UTM-WGS-84 with ~4m accuracy)<\/p>\n

Total thickness: 205.57 m<\/p>\n

Average strike and dip: about ~ 150\/50 (using the University of Calgary right-hand rule)<\/p>\n

Notice:<\/b><\/font> Data is based on unverified<\/strong> observations taken at the site by GLGL 337 field school(GLGY 337 B06 – Fall 2012) on 26 and 27th Aug, 2012. The data may not be accurate<\/strong> and information provided on this page must be used with caution. Data is copyrighted to Sanuja, Megan Slizer and other members at the University of Calgary.<\/p>\n

Legend<\/b><\/p>\n

\"\"
\n\"\"<\/p>\n

\n
\nTable: Stratigraphic cross section<\/b><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Unit<\/b><\/td>\nImage\/Diagram<\/b><\/td>\nObservations<\/b><\/td>\n<\/tr>\n
1
4.75 m<\/td>\n		<\/td>\nS\/D: 160\/35NW
-laminated mud-stone
OLDEST unit<\/i><\/b><\/td>\n<\/tr>\n
2
1.5 m<\/td>\n		<\/td>\nS\/D: 165\/38NW
-brecciated lime-mud-stone
-massive<\/td>\n<\/tr>\n
3
1.1 m<\/td>\n		<\/td>\nS\/D: 165\/42NW
-fined grain
-lime mud-stone
-massive<\/td>\n<\/tr>\n
4
0.75 m<\/td>\n		<\/td>\nS\/D: 150\/38NW
-brecciated and pebble mud-stone<\/td>\n<\/tr>\n
5
3.25 m<\/td>\n		<\/td>\nS\/D: 151\/39NW
-laminated layers clearly visible on broken samples
-some shiny grains
-sandy and darker grey
-lime mud-stone<\/td>\n<\/tr>\n
6
1.75 m<\/td>\n		<\/td>\nS\/D: 150\/50NW
-blocky
-light-grey weathering
-more vegetation than the unit 5<\/td>\n<\/tr>\n
7
3.0 m<\/td>\n		<\/td>\nS\/D: 150\/48NW
-blocky and layered
-brownish-black grains
-red AND white weathering<\/td>\n<\/tr>\n
8
12.19 m<\/td>\n		<\/td>\nFirst recessive section
S=30.50 m, B=2, A=124, D=40, bearing=296<\/p>\n		<\/tr>\n
9
6 m<\/td>\n		<\/td>\nS\/D: 153\/32
-bedding and jointing lines
-massive<\/td>\n<\/tr>\n
10
3 m<\/td>\n		<\/td>\nS\/D: 153\/32
-wackstone(changed from previous units of lime mudstone)
-about 3 m think beds
-calcite area has some fossils<\/td>\n<\/tr>\n
11
11.51 m<\/td>\n		<\/td>\nSecond recessive section<\/td>\n<\/tr>\n
12
12 m<\/td>\n		<\/td>\nS\/D: 152\/34NW
-slitstone due to grain size
-when hammered the rock chips off like shale
-plant trace fossils
-blocky and fizzes when HCL is added
-bedding planes are visible with jointing and fractures
-highly weathered compared to unit 10<\/td>\n<\/tr>\n
13
1.2 m<\/td>\n		<\/td>\nS\/D: 153\/40NW
-trace fossils
-platy and fissile<\/td>\n<\/tr>\n
14
1.5 m<\/td>\n		<\/td>\nS\/D: 153\/40
-grass vegetation on most surfaces
-an erosional or rock\/mud slide may have been occurred(some recessive areas)<\/td>\n<\/tr>\n
15
3.2 m<\/td>\n		<\/td>\nS\/D: 150\/40
-shale in blocky pieces
-large volume of mudstone(slilt?)
-softer shale
-most likely siltstone (changed in depositional environment)<\/td>\n<\/tr>\n
16
7.5 m<\/td>\n		<\/td>\nS\/D: 150\/42
-interbeded with shale(evident by the patterns of weathering\/colour)
-composition of layers in this unit sightly changes from NE to West (right to left)
-some large blocks of rocks appeared for the first time(compared to the previous lower numbered units)
-thickness of the beds has increased to about 30 m<\/td>\n<\/tr>\n
17
5.63 m<\/td>\n		<\/td>\nS\/D: 148\/42
-interbedding between siltstone and sandstone
-thinner interbeds than the units above
-two distinct weathering patterns (based on colour)
-small bits of shale<\/td>\n<\/tr>\n
18
7.5 m<\/td>\n		<\/td>\nS\/D: 147\/41
-largely covered with grass and vegetation
–any other data???<\/strong><\/td>\n<\/tr>\n
19
6 m<\/td>\n		<\/td>\nS\/D: 147\/42
-a lot of shale; not much silt
-interbeded with thin layers of siltstone
-the middle parts of the bed is covered with vegetation(may have been due to an erosional and\/or land\/rock\/mud slide events)<\/td>\n<\/tr>\n
20
9.75 m<\/td>\n		<\/td>\nS\/D: 150\/40
-blocky and massive
-shale with yellowish weathering colour
-about 30% lamination on slit layers<\/td>\n<\/tr>\n
21
7.5 m<\/td>\n		<\/td>\nS\/D: 150\/40
-more shale than siltstone in overall composition
-yellowish weathering at the top section of the unit<\/td>\n<\/tr>\n
22
8.20 m<\/td>\n		<\/td>\nSecond recessive section<\/td>\n<\/tr>\n
23
4 m<\/td>\n		<\/td>\nS\/D: 145\/40
-mostly shale with heavily weathered surfaces
-flakey<\/td>\n<\/tr>\n
24
6.3 m<\/td>\n		<\/td>\nS\/D: 160\/40
-most parts are covered with vegetation(may be due to erosional and\/or mud\/rock slide events)
-more siltstone<\/td>\n<\/tr>\n
25
8.47 m<\/td>\n		<\/td>\nThird recessive section<\/td>\n<\/tr>\n
26
15.56 m<\/td>\n		<\/td>\nPylons recessive section<\/td>\n<\/tr>\n
27
5.51 m<\/td>\n		<\/td>\nS\/D: 158\/45
-trace fossils in the clay-rich areas
-platy clay-reach slitstone
-dark grey layers forming bands in about 5% of the unit(chert layers-did not reacted with HCL and chert nodules also found)<\/td>\n<\/tr>\n
28
4.7 m<\/td>\n		<\/td>\nS\/D: 155\/42
-layered and platy
-chert layer has disappeared(compared to unit 27)
-calcite has recrystallized on the surface
-distinct weathering patterns<\/td>\n<\/tr>\n
29
10.5 m<\/td>\n		<\/td>\nS\/D: 155\/40
-siltstone
-fracture patterns has changed compared to the units above(less random; more uniform fractures)
-medium bed thickness with some lamination
-fractures are mostly thin straight lines
-less black minerals than unit 27 and 28<\/td>\n<\/tr>\n
30
14.75 m<\/td>\n		<\/td>\nS\/D: 160\/41
-thin curved fractures
-when hammered, the rock breaks into smaller, thinner and platy pieces
-reacted with HCL(fizzes)
-carbonate rock and most likely siltstone
-rounded corners can be seen on grains
-rusting was observed for the first time(red-yellow weathering colour)
-presence of pyrite and metalic minerals may be the cause of these “rust” weathering patterns
-stiltstone<\/td>\n<\/tr>\n
31
13 m<\/td>\n		<\/td>\nS\/D: 160\/40
-trace fossils(shiolthes\/p?)
-cryonide\/brachiopod body fossils
-ammonites and gastropods
-cross cutting planes; softer beds
-fizzes when HCL was introduced
-yellowish weathering
-wackstone(large % of grains)
-calcium carbonates with body fossils
-gradual contact between cross cuttings(grey bandings)<\/td>\n<\/tr>\n
32
4 m<\/td>\n		<\/td>\nS\/D: 160\/40
-calcareous limestone(but almost a boundstone)
-easily broken; platy and thin; aka not blocky
-in situ growth of fossils; brachiopods(not fossils transported from the original deposition)
-calcite nodules
YOUNGEST unit<\/i><\/b><\/td>\n<\/tr>\n<\/table>\n

<\/p>\n","protected":false},"excerpt":{"rendered":"

Location: 11 U 0627438 E \/ 5658531 N (UTM-WGS-84 with ~4m accuracy) Total thickness: 205.57 m Average strike and dip: about ~ 150\/50 (using the University of Calgary right-hand rule) Notice: Data is based on<\/p>\n","protected":false},"author":2,"featured_media":1575,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[17],"tags":[8,23],"class_list":["post-1567","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-earth-science","tag-academic","tag-geology"],"jetpack_featured_media_url":"https:\/\/sanuja.com\/blog\/wp-content\/uploads\/2012\/09\/exshaw-x-sec.jpg","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/sanuja.com\/blog\/wp-json\/wp\/v2\/posts\/1567","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sanuja.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sanuja.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sanuja.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/sanuja.com\/blog\/wp-json\/wp\/v2\/comments?post=1567"}],"version-history":[{"count":0,"href":"https:\/\/sanuja.com\/blog\/wp-json\/wp\/v2\/posts\/1567\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sanuja.com\/blog\/wp-json\/wp\/v2\/media\/1575"}],"wp:attachment":[{"href":"https:\/\/sanuja.com\/blog\/wp-json\/wp\/v2\/media?parent=1567"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sanuja.com\/blog\/wp-json\/wp\/v2\/categories?post=1567"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sanuja.com\/blog\/wp-json\/wp\/v2\/tags?post=1567"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}