Block 4: Coasts: Where Land Meets Ocean
Marina Beach is one of the world's widest urban beaches, and it exists partly by accident: the harbour built in 1881 trapped sand that the sea was carrying along the coast. Task: sketch or describe your best guess: where does that sand come from, where was it going, and what stopped it? Guess freely. Today's block confirms or corrects you.
Answer in your Field Notebook, dated.
I can name longshore drift, wave erosion, and beach accretion, explain the role of monsoon storms in Chennai sediment cycling, and identify 2 active coastal processes at a coastal Chennai location of my choosing.
I can investigate how water shapes rock, sediment, and land.
"Plan and conduct an investigation of the properties of water and its effects on Earth materials and surface processes."
Where this runs:
- U2 B3: Rivers as Landscape Sculptors
- U2 B4: Coasts: Where Land Meets Ocean ← you are here
Assessed:
Landscape Reading: river/coast process analysis for water-shaped locations (K/U + T/T, Components 1–4)
On track looks like:
You can point at a Chennai landform and name the specific water process responsible, with evidence from imagery or data.
What today is about
Two coasts, two stories. Same Chennai region, geological-time apart.
Marina Beach is one of the world's longest urban beaches; Chennai built itself around it. Monsoon-driven sediment cycling, longshore drift, the port's interruption of natural sediment transport, the 2004 tsunami's brief rewrite of the profile, the post-2015 floods, the seasonal narrowing-and-widening pattern. Marina's surface processes are happening fast enough to see year-to-year.
Mahabalipuram is a different story entirely. Cretaceous-age granites carved into temples 1300 years ago, now studied for evidence of millennial-scale coastal change. The famous "submerged temples" lore is partly archaeology, partly sea-level signal, partly tourist legend. Surface processes here happen on geological time; the human-time layer sits on top.
Today: coastal processes (longshore drift, wave erosion, beach accretion), the role of monsoon storms, and the contrast between fast-time (Marina) and deep-time (Mahabalipuram) coastal reading. By Block 9 you'll defend something for the Greater Chennai Corporation planning audience; today you start practicing on a coast.
Before you start the work
Start with the Interact: Marina and Mahabalipuram side by side, in pairs, anchoring the day. The Watch sets it up, and the Read is your reference. Notes go in your Class Notebook as a Power outline.
Taking notes? Power 1 seeds for today
Today's work: choose one path
All four paths end the same: a photo of a Chennai coastal location + 3 sentences identifying 2 active coastal processes. The path you pick is about how deep you go.
Open your Class Notebook and type today's entry header as Heading 2:
A: Oct 28 | U2 B4 | Coasts: Where Land Meets OceanB: Oct 29 | U2 B4 | Coasts: Where Land Meets Ocean
What you're submitting today
A photo + 3 sentences. Specificity matters more than length.
One photo (yours, or Google Earth screenshot, or curated with source noted). Three sentences. Sentence 1: which coastal Chennai location, captured when. Sentence 2: first coastal process visible, with the specific evidence. Sentence 3: second coastal process visible, with the specific evidence. If you went Path B, you'll have sentences 4-5 on the Mahabalipuram comparison.
Submit via Google Classroom (link posted in August)One question before you leave
Three to five minutes. Your answer is saved to your reflection journal, where you can read back everything you have written this year.
The reflection style this block is the "I used to think... now I think..." move.
Today's reflection is in Google Classroom, under Reflection Journal.
Link posted in AugustSign in with your school account. Your teacher can see what you write here.