My Nguyen

I strive for a cup of tea with honey

[My Nguyen @MyNguye10513337]

Huge congrats!

Coronavirus Disease 2019 (COVID-19)–Related Stress and... : Obstetrics & Gynecology https://t.co/NdWmztrY7d

[My Nguyen @MyNguye10513337]

What the West Can Learn From Vietnam’s Response to Covid-19 https://t.co/0i8gcXxznY #covid19 #coronavirus #hackernoontopstory via @linhdaosmooke

[My Nguyen @MyNguye10513337]

#UREES101 @paleololigo Final one, Swash and Backwash are both movement of water up a beach after a wave breaks. Swash is the movement of water up the beach vs Backwash is The backward movement of water down a beach. Is this correct?

[Penny Higgins @paleololigo]

I'm officially exhausted and am going to bed. I'll check the #UREES101 hashtag from my phone one more time when I crawl under the sheets, so get your questions in!

[My Nguyen @MyNguye10513337]

#UREES101 (...) hanging valley (A valley left by a melted tributary glacier that enters a larger glacial valley above its base, high up on the valley wall)

[My Nguyen @MyNguye10513337]

@paleololigo #UREES101 Am I missing something for these definitions: U-shaped Valley (A valley left by a melted tributary glacier that enters a larger glacial valley above its base, high up on the valley wall) (tbc.)

[My Nguyen @MyNguye10513337]

@paleololigo #UREES101 Thank you!

[My Nguyen @MyNguye10513337]

Because materials can be brought in by wind and waves, and with the motion of the waves, many are deposited there? #UREES101

[Penny Higgins @paleololigo]

@MyNguye10513337 Beaches are popular depositional environments.

Any ideas why?

#UREES101

[My Nguyen @MyNguye10513337]

very well-sorted and well-rounded, if there are clams or mussels then would be at a beach but if there are none then would be sand dunes? #UREES101

[Penny Higgins @paleololigo]

#UREES101 - Name that sedimentary environment:

Sandstone with highly rounded quartz grains. Does not react with acid.

[My Nguyen @MyNguye10513337]

cross-bedding indicates flow, with clams => a beach? #UREES101

[Penny Higgins @paleololigo]

#UREES101 - Name that sedimentary environment:

Cross-bedded sandstone with fossilized remains of clams. Sandstone reacts with acid, as does the fossils.

[My Nguyen @MyNguye10513337]

@paleololigo #UREES101 conglomerate => have been eroded enough to be well-rounded however poorly sorted => alluvial fans?

[My Nguyen @MyNguye10513337]

@paleololigo so deeper in the ocean, if there's fossil => somewhere in a delta however if not, could also be deep in a lake? #UREES101

[Penny Higgins @paleololigo]

@MyNguye10513337 These are tiny, tiny grains and all clay. Grains at a beach tend to be a little bigger.

Partial credit.

#UREES101

[My Nguyen @MyNguye10513337]

clams, mussel shells => near a beach? #UREES101

[Penny Higgins @paleololigo]

#UREES101 - Name that sedimentary environment:

Rock composed entirely of the broken up bits of clam, mussel, and oyster shells. Reacts strongly to acid.

[My Nguyen @MyNguye10513337]

#UREES101 @paleololigo fossils of single-celled organisms in rocks (chert) => deep in the ocean @paleololigo

[Penny Higgins @paleololigo]

#UREES101 - Name that sedimentary environment:

Conglomerate with pebble-sized grains that are randomly oriented and supported in a clay matrix.

[My Nguyen @MyNguye10513337]

En echelon stacks => flow, well-rounded grains but not very well-sorted => could be near the alluvial fan #UREES101

[Penny Higgins @paleololigo]

#UREES101 - Name that sedimentary environment:

Conglomerate with well-rounded pebble- to cobble-sized grains that are imbricated (that is in en echelon stacks). Large grains are in a claystone matrix.

[My Nguyen @MyNguye10513337]

well sorted, minute grain size => near a beach? #UREES101

[Penny Higgins @paleololigo]

#UREES101 - Name that sedimentary environment:

Thin layers of minute clay mineral particles.

[My Nguyen @MyNguye10513337]

The fragments are poorly sorted, large grain sized, and very angular => not that far from the source => somewhere in the headwaters of a river? #UREES101

[Penny Higgins @paleololigo]

#UREES101 - Name that environment:

Jagged rock fragments, ranging in size from 1 mm to 2 cm stuck together in a mud matrix.

[My Nguyen @MyNguye10513337]

#UREES101 @paleololigo Can you also explain the Ferrel cell and Polar cell again? Also, is it correct to say, at the equator is where it is the hottest => air rising => thunderstorm => rains it all out => by the time it descends at 30 degree N and S, there is no more moisture?

[My Nguyen @MyNguye10513337]

@paleololigo Due to gravity, glacier always flows downhill. However, if there is ablation is greater or less accumulation, the glacier melts faster than its flow, therefore we say that the glacier retreats uphill. Is this correct? #UREES101 @paleololigo

[My Nguyen @MyNguye10513337]

#UREES101 Anything else on the topic of Glaciers that I missed?

[My Nguyen @MyNguye10513337]

#UREES101 @paleololigo Can you explain again how as the air rises from the equator and descends at 30 degree N and S (where the pressure is high), moisture is almost gone and thus deserts are formed?

[My Nguyen @MyNguye10513337]

#UREES101 On the topic of Deserts, can you name the atmospheric circulations that affect the weather pattern, thus the location of the deserts?

Trade winds
Westerlies
Polar casterlies

Can you relate these to Ferrel cell and Hadley cell?