A Dyke of Basalt (A) Piercing Triassic Sandstone
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A Dyke of Basalt (A) Piercing Triassic Sandstone
A Dyke of Basalt(A) Piercing Triassic Sandstone(C) and Sending Intrusive Sheets Or Sills(B) Into It - a diagram of Volcanic activity. (Location: Ireland). Date: circa early 1900s
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Media ID 14356150
© National Museums NI / Mary Evans
Activity Diagram Dyke Intrusive Piercing Sending Sheets Triassic Volcanic
EDITORS COMMENTS
1. Title: A Dyke of Basalt (A) Piercing Triassic Sandstone: An Illustration of Volcanic Activity in Ireland (circa early 1900s) This diagram, sourced from the extensive archives of Mary Evans Prints Online, provides a fascinating glimpse into the geological wonders of Ireland during the early 1900s. The image illustrates the intrusion of a dyke of basalt (A) as it pierces through the Triassic sandstone (C), sending intrusive sheets or sills (B) into the sedimentary rock. Volcanic activity is a dynamic and powerful force that shapes the Earth's surface. In this illustration, we witness the formation of a basalt dyke, a type of intrusive igneous rock, as it forces its way through the weaker Triassic sandstone. The pressure exerted by the molten basalt causes the sandstone to crack and deform, creating a distinctive, jagged edge around the intrusion. As the basalt dyke continues to push forward, it sends sheets or sills (B) of cooled, solidified rock into the surrounding sandstone. These intrusions form as the basalt cools and solidifies within the confines of the sandstone, creating new layers that are intimately intertwined with the older sedimentary rock. This intriguing diagram offers a unique perspective on the geological processes that have shaped our planet. It serves as a testament to the ever-changing landscape and the enduring power of volcanic activity, which continues to captivate scientists and explorers alike. Location: Ireland Date: Circa early 1900s Keywords: dyke, basalt, piercing, triassic sandstone, sending, intrusive sheets, sills, diagram, volcanic activity, location, ireland.
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