ok, lets hit each of the issues brought up by the first link....
1) Dendrochronology.... the statement ignores petrified and other such preserved trees that are older than the oldest living Bristlecone... his parents and grandparents and great grandparents and so on.. older than 6000 years. PS... the King Clone bristlecone creasote bush is 11,700 years old.
2)Genetic Load... ok, this one would take far to long. It is far to full of errors to adiquately cover... Mutations are often bennifical, Bad mutations have a way of weeding themselves out of the gene pool... the very idea of a maximum cap on "genetic load" is silly to begin with.
3)Population sudies... fundimentally flawed.. it does not account for.. war, disease, famine, accidental death, predation or any of the other historical population checks. Not to mention that the average life span for much of human history has been less than 35 years and is still less than that in many parts of the world. The only way for two people to become 6 billion in 6000 years is for not one child to have died before becoming a parent. A factual impossibility.
The bible for instance has many accounts of millions of people including small children being slaughtered in battle.
4) lets see... for one if the rocks are so leaky then there wouldn't be any pressure at all. Oil is not datable relyably with C14, C14 dissapates below relyable readings in only a few tens of thousands of years... any readings from a sample older than that will be hopelessly muddled. Many such dates come up falcely young due to contamination and the lack of a perfect vaccume. AS for the turning of Halifaxes sewage into oil...
I can't find any referance to this supposed miracle anywhere other than this site and one other that quotes it. My best guess untill evidence is offered up, is that this is a hoax.
5) Ahh the joy of averages... actually the depth of topsoil varies from 0 inches to over 20 feet. (Argentina averages around 20 feet) Topsoil is constantly moving, being formed not only by errosion but by decaying plant and animal material... Topsoil is also being converted into sedimentary rocks. You can not calculate the age of a place by the ammount of topsoil. We in the USA for instance recieve about 3 inches of topsoil every year from China, blown by the wind over the ocean and landing all over the North American contenent.
Thus any "dates" obtained from topsoil creation are inherantly misleading.
6) Erosion... once again demonstrated lack of understanding of the process of erosion. Cliff sharpness is deterimed by the activity of the weathering and the hardness of the rock. Also for the Himilayan mountains to have been formed during Noahs flood they would have had to been pushed up at a rate of hundreds of feet per second. Today they grow at a stately 2 inches a year.
7)Mississippi river Delta... once again a poor understanding of erosion. The reason the Mississippi must be dredged is that the river is so heavily channeled and build uppon that it can no longer deposit its soil in a natural manner. The soil would normally have been left not only in the delta but uppon the flooded banks... the soil deposited also travels further out than just the delta.
8)Ocean sediment... again same misunderstanding of erosion and rock formation.
9)Mineral concentration... 10)Salt content... 1899... well instruments have gotten much better in the past 200 years. There are several ways for salt to be removed from the oceans.. enough for the salinization of the Earth to remain reasonably stable.
11) sea ooze... what is sea ooze? how is it measured in comparison to the rest of the sediment. How do you measure sea ooze but not the rest of the sediment.
12)stalagmites and stalagtites... missunderstanding of the process of formation. Gypsum forms quickly, Limestone caves with there Calcium carbonate form very slowly.
13)Niagra falls... dated to 7000 years ago.. but this says nothing about how old the earth is, just how long the river has been erroding the falls.
14)volcanic water and rocks... what?
15)water from molten rock... see above.
16)dead sea salt... once again poor understanding of evaporation, erosion and soil formations.
17)Earth heat... does not take into account the insulating properties of the Earth itself... rock holds heat quite well.
18)Magnetic field... misunderstanding of the evidenced fluctuation rates of the magnetic field and the periodic polarity shifts.
19)atmospheric helium... doesn't take into account the fact that elements are lost to the solar winds.
20)Earths spin is slowing... at a rate of .005 seconds every year, perfectly reasonable for a 4.6 billion year old earth.
21)C-14.... once again too many issues to fit in a "short" responce.
wa:do
ps. thanks to Talk Origins ammong others for jogging my memory on details.
http://www.talkorigins.org/indexcc/list.html