Virtual Exhibition Experience: Crawford Lake: Layers in Time

A computer screen on a desk displays an image of a glassy lake ringed by trees

Catégorie

Classroom/At Home Activity

Public

Educators, Students

Âge

9-18

Classe

1-12

Sujets

Art & Culture, Canada, Canadian & World Studies, General, History, Indigenous, Language, Science, Science & Technology, Social Sciences & Humanities, Social Studies, The Arts

About

Just outside Toronto, Ontario lies a significant site offering a unique, comprehensive 1,000-year record of human impacts - local, regional, and global: Crawford Lake near Milton, Ontario.

The lake has intrigued scientists for decades, and research on sediments at the bottom of the lake has identified it as having the best record of humanity's impact on the planet. This has led to the lake's selection as a "golden spike" (definitive marker showing where one epoch ends and another begins) candidate for a proposed new geological time period - defined by human-caused climate change - the Anthropocene.

Showcasing Indigenous belongings and settler objects, examples of local and introduced plants, historical documentation, related artworks, core samples, and more, Crawford Lake: Layers in Time offers an engaging, compelling look at the record of human life on Earth. The exhibition illustrates how everything from early agriculture to modern nuclear weapons testing has left its mark on this unassuming Canadian lake - and on the Earth at large - encouraging us to consider what record our activities and the decisions we make today will be left behind for future generations to uncover.

Register your class for the free Virtual Exhibition

You will receive a link in the confirmation after you submit your registration.

Use the Virtual Exhibition as a primary means of access to the exhibition content, or as a refresher and learning enhancer after an onsite visit.

Finish off with the Crawford Lake: Visions of the Future activity.

 

Learning Goals

Understand how climate-altering human events are recorded in the sediment of Crawford Lake.

Compare the traces that different types of human activities leave in the sediment records.

Discover how scientists collect and interpret information from the sediment layers in the lake.

Fast Facts

In a legend about Crawford Lake, horses lie undisturbed at the lake bottom, until awakening at sunset. 

There are two pieces of rare Trinitite on display. Trinitite is fused silica sand; this glassy residue was formed when the desert sand at the Trinity nuclear test site in New Mexico was fused by the intense heat of the world's first nuclear detonation on July 16, 1945. The Trinity test was the first detonation of a nuclear weapon. The site was named "Trinity" after a poem by John Donne.

In 2023, Crawford Lake, Ontario, was identified as a site with the clearest record of profound human-caused changes to the Earth, a time period—from the 1950s to now—informally known as the Anthropocene. 

Curriculum Connections

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