Joanne P Ballard

10 Questions 82 Answers 0 Followers

Questions related from Joanne P Ballard

How do animals geonavigate, how many animal species can do this, and can/did humans also use the earth's magnetic field to geonavigate?

I have heard of lobsters using the earth's geomagnetic field, and now, sharks. How many other animals navigate use the earth's magnetic field? I have also read that indigo buntings travel at...

15 May 2021 7,984 5 View

Why are woolly mammoth remains found in quarry environments in southern Indiana? How typical are quarry finds of Pleistocene fossils?

Pleistocene remains such as woolly mammoth bones have been found in some quarries in southern Indiana. Do these fossils in quarry settings indicate a high energy depositional environment, perhaps...

04 February 2018 4,335 100 View

During extinction events (geologic time scale divisions), how do nutrients get moved around in ecosystems?

To think about this, consider that thousands of wildebeests drown annually in Africa, and this has a major effect on the movement of Nitrogen, Phosphorus, and Carbon in...

24 June 2017 9,934 8 View

Is the partial albinism in coastal redwoods (to store toxins?) a more widespread phenomenon?

Zane Moore at UC Davis is studying why the coastal redwoods produce white waxy leaves (albinism) on parts of some trees. These chimera trees (some of the leaves are green, some are white, and some...

17 June 2017 4,832 9 View

How quickly do you think dinoflagellates or chrysophytes in a freshwater pond or lake can produce resting cysts in large numbers?

For instance, if conditions suddenly became unfavorable for them due to inundation with sediment, could they produce resting cysts by the hundreds or thousandsin a matter of days?

27 May 2016 2,342 6 View

Did humans tame woolly mammoths or other megafauna?

Considering that some people are gifted with handling animals (e.g. horse whisperers), could paleoindians or other Pleistocene peoples have gained the confidence of woolly mammoths or mastodons to...

09 April 2016 5,789 100 View

If a mile high ice sheet (the Laurentide) was quickly removed, how would wind patterns and climate be affected?

Maureen Raymo hypothesized that the Himalayas radically changed climate by affecting wind patterns by their uplift. I want to know how you can radically change climate by removing a miles-high ice...

21 February 2015 9,793 17 View

Has anyone studied freshwater dinoflagellate cysts?

I am investigating the possibility of eutrophication that triggered a massive expansion of dinoflagellate cysts in a pond in the southeastern USA.

12 March 2014 8,599 5 View

Has anyone hypothesized that the glacial grooves on Kelleys Island Ohio were formed in soft sediment, then lithified?

The genesis of the Kelleys Island flutes is debated. http://www.ux1.eiu.edu/~cfjps/1300/glacier_photos.html See 15th photo down.

09 January 2014 3,145 1 View

Has anyone noticed siliceous aggregates in late glacial sediments?

These would be visible in thin section as silt-sized particles cemented with silica.

27 December 2013 7,270 1 View