NOT A NIGHT CACHE.
**Please read through the questions and required photo elements. I will read and reply to all responses. My recommendation is to submit the required photos via the in-game message system as this is the most efficient (and easiest) method (based on feedback from other geocachers).
Each person in a group must include their own photo demonstrating that they were on site with their log.**
***Please head to the escalators leading up (can also go down) to the Main St overpass (Skybridge) to locate the Tyndall Stone. The stone composes the internal walls in the escalator area - no need to enter any shops. The escalators are accessible from the ground floor opposite to the food court / accessible from the upper floor leading down to the food court area.***
As I was strolling through City Creek, the outside walls, particularly at the escalators and leading up to the overpass, immediately caught my eye. Upon closer inspection, it appeared to be Tyndall Stone. This stone is named after the town of Tyndall, Manitoba, where the stone is quarried, and in turn named after Irish physicist John Tyndall (1820–93).
Tyndall Stone is highly fossiliferous and the fossils contribute to its aesthetic appeal. It contains numerous fossil gastropods, brachiopods, cephalopods, trilobites, corals, stromatoporoids, and others. See the attached or linked images (trilobite, corals, stromatoporoids).
Tyndall Stone is a dolomitic limestone (sedimentary rock) that is quarried from the Selkirk Member of the Ordovician Red River Formation in the vicinity of Garson and Tyndall, Manitoba, Canada. It is a cream-coloured limestone with a pervasive mottling of darker dolomite. The mottling gives the rock a tapestry-like effect, and it is popular for use as a building and ornamental stone. The mottling results from burrowing by marine creatures that occurred during and shortly after limestone deposition. The identity of the burrowing organisms is not known, but fossil burrows of this type have been given the name Thalassinoides.
In 2023, Tyndall Stone was designated as a Global Heritage Stone Resource, the only one of Canadian origin.
Questions to Answer:
Please send your responses, including the names of all group members. Please recall that each individual needs to post their own unique photo with their log. I will read and reply to all submissions.
1. Select 2 different types of fossils and:
a) Describe and measure each of your selected fossils in cm / inches;
b) Include (send me) a photo of each of the fossils with your answer (do not post) - the in-game IM system works best to send photos;
c) Based on your observations and the lesson, identify each of the fossils.
2. Take a photo of you / your GPS / your caching name in front of the Main Street historical information (on the SIDE of the overpass (the Skybridge), not the ground) - this is waypointed. *Post this with your log.* Please note that this is the required photo to demonstrate that you were on site.
Thanks for visiting!